diff --git a/configs/amber/hello/Make.defs b/configs/amber/hello/Make.defs
index 779ece0d63c..f14ef33ef8b 100644
--- a/configs/amber/hello/Make.defs
+++ b/configs/amber/hello/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/amber/src/Makefile b/configs/amber/src/Makefile
index abd76a65897..21025055dac 100644
--- a/configs/amber/src/Makefile
+++ b/configs/amber/src/Makefile
@@ -42,55 +42,4 @@ ifeq ($(CONFIG_ARCH_LEDS),y)
 CSRCS += atmega_leds.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_ARCH_FAMILY_AVR32),y)
-ARCH_SUBDIR = avr32
-endif
-ifeq ($(CONFIG_ARCH_FAMILY_AVR),y)
-ARCH_SUBDIR = avr
-endif
-
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}"
-else
-  CFLAGS += -I "$(TOPDIR)/sched"
-  CFLAGS += -I "$(ARCH_SRCDIR)/chip"
-  CFLAGS += -I "$(ARCH_SRCDIR)/common"
-  CFLAGS += -I "$(ARCH_SRCDIR)/$(ARCH_SUBDIR)"
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/arduino-due/nsh/Make.defs b/configs/arduino-due/nsh/Make.defs
index 0474b94a274..17b4b978b24 100644
--- a/configs/arduino-due/nsh/Make.defs
+++ b/configs/arduino-due/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/arduino-due/src/Makefile b/configs/arduino-due/src/Makefile
index 7f7844c8cbf..e4f1e3054be 100644
--- a/configs/arduino-due/src/Makefile
+++ b/configs/arduino-due/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -73,45 +69,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += sam_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/avr32dev1/nsh/Make.defs b/configs/avr32dev1/nsh/Make.defs
index 2b9bd7a4ab3..6e2b6cdc2a1 100644
--- a/configs/avr32dev1/nsh/Make.defs
+++ b/configs/avr32dev1/nsh/Make.defs
@@ -90,6 +90,7 @@ CXXPICFLAGS = $(ARCHPICFLAGS) $(ARCHALLCXXFLAGS)
 CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS = $(ARCHALLCFLAGS) -D__ASSEMBLY__
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/avr32dev1/ostest/Make.defs b/configs/avr32dev1/ostest/Make.defs
index d5956462938..81aa2b92103 100644
--- a/configs/avr32dev1/ostest/Make.defs
+++ b/configs/avr32dev1/ostest/Make.defs
@@ -104,6 +104,7 @@ CXXPICFLAGS = $(ARCHPICFLAGS) $(ARCHALLCXXFLAGS)
 CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS = $(ARCHALLCFLAGS) -D__ASSEMBLY__
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/avr32dev1/src/Makefile b/configs/avr32dev1/src/Makefile
index 9117c3a8416..df8d3890e9e 100644
--- a/configs/avr32dev1/src/Makefile
+++ b/configs/avr32dev1/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = avr32_boot.c
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -46,45 +44,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += avr32_buttons.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/avr32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/avr32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
-
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/c5471evm/httpd/Make.defs b/configs/c5471evm/httpd/Make.defs
index bdf36e67997..a459d9f8dc6 100644
--- a/configs/c5471evm/httpd/Make.defs
+++ b/configs/c5471evm/httpd/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/c5471evm/nettest/Make.defs b/configs/c5471evm/nettest/Make.defs
index cebda6103fa..d26455557f0 100644
--- a/configs/c5471evm/nettest/Make.defs
+++ b/configs/c5471evm/nettest/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/c5471evm/nsh/Make.defs b/configs/c5471evm/nsh/Make.defs
index ec27b9ac7db..f4491b4b4f0 100644
--- a/configs/c5471evm/nsh/Make.defs
+++ b/configs/c5471evm/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/c5471evm/src/Makefile b/configs/c5471evm/src/Makefile
index 60db23060b6..e43f8cf04e3 100644
--- a/configs/c5471evm/src/Makefile
+++ b/configs/c5471evm/src/Makefile
@@ -35,49 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = c5471_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I $(ARCH_SRCDIR)$(DELIM)chip -I $(ARCH_SRCDIR)$(DELIM)common -I $(ARCH_SRCDIR)$(DELIM)arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/cc3200-launchpad/nsh/Make.defs b/configs/cc3200-launchpad/nsh/Make.defs
index b7f4e01714a..db80c6519ee 100644
--- a/configs/cc3200-launchpad/nsh/Make.defs
+++ b/configs/cc3200-launchpad/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/cc3200-launchpad/src/Makefile b/configs/cc3200-launchpad/src/Makefile
index c9b9b3e4868..6e07a432b92 100644
--- a/configs/cc3200-launchpad/src/Makefile
+++ b/configs/cc3200-launchpad/src/Makefile
@@ -36,53 +36,11 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched -I../include
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = cc3200_boot.c cc3200_serial.c cc3200_utils.c cc3200_leds.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
 CSRCS += cc3200_autoleds.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/cloudctrl/nsh/Make.defs b/configs/cloudctrl/nsh/Make.defs
index b2844917055..e44deaf3c3a 100644
--- a/configs/cloudctrl/nsh/Make.defs
+++ b/configs/cloudctrl/nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/cloudctrl/src/Makefile b/configs/cloudctrl/src/Makefile
index f2036f024d7..70c1a4b9345 100644
--- a/configs/cloudctrl/src/Makefile
+++ b/configs/cloudctrl/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c stm32_chipid.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -89,43 +85,4 @@ ifeq ($(CONFIG_STM32_PHYINIT),y)
 CSRCS += stm32_phyinit.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/compal_e86/nsh_highram/Make.defs b/configs/compal_e86/nsh_highram/Make.defs
index 5448d3627b7..3b3c9999eb9 100644
--- a/configs/compal_e86/nsh_highram/Make.defs
+++ b/configs/compal_e86/nsh_highram/Make.defs
@@ -121,6 +121,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/compal_e86/src/Makefile b/configs/compal_e86/src/Makefile
index f519bca3a9a..b8f7e5dc8a3 100644
--- a/configs/compal_e86/src/Makefile
+++ b/configs/compal_e86/src/Makefile
@@ -39,49 +39,6 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = boot.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\arm
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/compal_e88/nsh_highram/Make.defs b/configs/compal_e88/nsh_highram/Make.defs
index 569116f9d4f..c7dbe379c5f 100644
--- a/configs/compal_e88/nsh_highram/Make.defs
+++ b/configs/compal_e88/nsh_highram/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/compal_e88/src/Makefile b/configs/compal_e88/src/Makefile
index 86af06e3ab2..e4703f9a0a8 100644
--- a/configs/compal_e88/src/Makefile
+++ b/configs/compal_e88/src/Makefile
@@ -39,49 +39,6 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = boot.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\arm
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/compal_e99/nsh_compalram/Make.defs b/configs/compal_e99/nsh_compalram/Make.defs
index f99e19eaf4e..6e0d252bf87 100644
--- a/configs/compal_e99/nsh_compalram/Make.defs
+++ b/configs/compal_e99/nsh_compalram/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/compal_e99/nsh_highram/Make.defs b/configs/compal_e99/nsh_highram/Make.defs
index cd31943938c..109b08c5df0 100644
--- a/configs/compal_e99/nsh_highram/Make.defs
+++ b/configs/compal_e99/nsh_highram/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/compal_e99/src/Makefile b/configs/compal_e99/src/Makefile
index abae99b94e0..c2ad1cc7769 100644
--- a/configs/compal_e99/src/Makefile
+++ b/configs/compal_e99/src/Makefile
@@ -39,49 +39,6 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = boot.c ssd1783.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\arm
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/demo9s12ne64/ostest/Make.defs b/configs/demo9s12ne64/ostest/Make.defs
index 7a6ffbeff17..6b9eec66a13 100644
--- a/configs/demo9s12ne64/ostest/Make.defs
+++ b/configs/demo9s12ne64/ostest/Make.defs
@@ -110,6 +110,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/demo9s12ne64/src/Makefile b/configs/demo9s12ne64/src/Makefile
index 3e376552248..aaf5218f756 100644
--- a/configs/demo9s12ne64/src/Makefile
+++ b/configs/demo9s12ne64/src/Makefile
@@ -35,51 +35,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = m9s12_boot.c m9s12_leds.c m9s12_buttons.c m9s12_spi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += m9s12_nsh.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/dk-tm4c129x/ipv6/Make.defs b/configs/dk-tm4c129x/ipv6/Make.defs
index 413c9da11a9..3feec176c28 100644
--- a/configs/dk-tm4c129x/ipv6/Make.defs
+++ b/configs/dk-tm4c129x/ipv6/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/dk-tm4c129x/nsh/Make.defs b/configs/dk-tm4c129x/nsh/Make.defs
index 8b28ba98171..0ce553800e4 100644
--- a/configs/dk-tm4c129x/nsh/Make.defs
+++ b/configs/dk-tm4c129x/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/dk-tm4c129x/src/Makefile b/configs/dk-tm4c129x/src/Makefile
index 5ce6c83d28b..8f9643144ca 100644
--- a/configs/dk-tm4c129x/src/Makefile
+++ b/configs/dk-tm4c129x/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = tm4c_boot.c tm4c_bringup.c tm4c_ssi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -69,43 +66,4 @@ CSRCS += tm4c_tmp100.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ea3131/nsh/Make.defs b/configs/ea3131/nsh/Make.defs
index 61d18fdc55c..fc4b979bf00 100644
--- a/configs/ea3131/nsh/Make.defs
+++ b/configs/ea3131/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ea3131/pgnsh/Make.defs b/configs/ea3131/pgnsh/Make.defs
index 85f2898256d..8b411e7c644 100644
--- a/configs/ea3131/pgnsh/Make.defs
+++ b/configs/ea3131/pgnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ea3131/src/Makefile b/configs/ea3131/src/Makefile
index 13160b908fa..7279a56af16 100644
--- a/configs/ea3131/src/Makefile
+++ b/configs/ea3131/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = lpc31_boot.c lpc31_clkinit.c
 
 ifeq ($(CONFIG_ARCH_BUTTONS),y)
@@ -75,41 +71,4 @@ CSRCS += lpc31_usbmsc.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ea3131/usbserial/Make.defs b/configs/ea3131/usbserial/Make.defs
index 0d9ea55b8e8..b96dfeff4a7 100644
--- a/configs/ea3131/usbserial/Make.defs
+++ b/configs/ea3131/usbserial/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ea3152/ostest/Make.defs b/configs/ea3152/ostest/Make.defs
index cbfa24ec3c1..5e1882159d7 100644
--- a/configs/ea3152/ostest/Make.defs
+++ b/configs/ea3152/ostest/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ea3152/src/Makefile b/configs/ea3152/src/Makefile
index 01afcb5e723..f7a8bbdfc57 100644
--- a/configs/ea3152/src/Makefile
+++ b/configs/ea3152/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = lpc31_boot.c lpc31_clkinit.c
 ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += lpc31_buttons.c
@@ -62,43 +58,5 @@ endif
 ifeq ($(CONFIG_USBMSC),y)
 CSRCS += lpc31_usbmsc.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/eagle100/httpd/Make.defs b/configs/eagle100/httpd/Make.defs
index d067c454915..80d00e637e2 100644
--- a/configs/eagle100/httpd/Make.defs
+++ b/configs/eagle100/httpd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/eagle100/nettest/Make.defs b/configs/eagle100/nettest/Make.defs
index 2565357b81c..e018209bc8e 100644
--- a/configs/eagle100/nettest/Make.defs
+++ b/configs/eagle100/nettest/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/eagle100/nsh/Make.defs b/configs/eagle100/nsh/Make.defs
index 6d91bdfd1f6..d483a17c54c 100644
--- a/configs/eagle100/nsh/Make.defs
+++ b/configs/eagle100/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/eagle100/nxflat/Make.defs b/configs/eagle100/nxflat/Make.defs
index f965484eb6f..a0652f1afb1 100644
--- a/configs/eagle100/nxflat/Make.defs
+++ b/configs/eagle100/nxflat/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/eagle100/src/Makefile b/configs/eagle100/src/Makefile
index af5ee760659..f7286c53e93 100644
--- a/configs/eagle100/src/Makefile
+++ b/configs/eagle100/src/Makefile
@@ -35,51 +35,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += lm_nsh.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/eagle100/thttpd/Make.defs b/configs/eagle100/thttpd/Make.defs
index 5235ac54ce8..211bcba3e9a 100644
--- a/configs/eagle100/thttpd/Make.defs
+++ b/configs/eagle100/thttpd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/efm32-g8xx-stk/nsh/Make.defs b/configs/efm32-g8xx-stk/nsh/Make.defs
index 5de73c1f272..3301de80adb 100644
--- a/configs/efm32-g8xx-stk/nsh/Make.defs
+++ b/configs/efm32-g8xx-stk/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/efm32-g8xx-stk/src/Makefile b/configs/efm32-g8xx-stk/src/Makefile
index d2503cc8bdc..f0314ad3358 100644
--- a/configs/efm32-g8xx-stk/src/Makefile
+++ b/configs/efm32-g8xx-stk/src/Makefile
@@ -35,6 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
+ASRCS =
 CSRCS = efm32_boot.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -43,41 +44,4 @@ else
 CSRCS += efm32_userleds.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/efm32gg-stk3700/nsh/Make.defs b/configs/efm32gg-stk3700/nsh/Make.defs
index 5de73c1f272..3301de80adb 100644
--- a/configs/efm32gg-stk3700/nsh/Make.defs
+++ b/configs/efm32gg-stk3700/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/efm32gg-stk3700/src/Makefile b/configs/efm32gg-stk3700/src/Makefile
index ae6b40c6984..6854755b545 100644
--- a/configs/efm32gg-stk3700/src/Makefile
+++ b/configs/efm32gg-stk3700/src/Makefile
@@ -35,6 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
+ASRCS =
 CSRCS = efm32_boot.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -43,41 +44,4 @@ else
 CSRCS += efm32_userleds.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ekk-lm3s9b96/nsh/Make.defs b/configs/ekk-lm3s9b96/nsh/Make.defs
index ada10b7e054..a6757b846f3 100644
--- a/configs/ekk-lm3s9b96/nsh/Make.defs
+++ b/configs/ekk-lm3s9b96/nsh/Make.defs
@@ -92,6 +92,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ekk-lm3s9b96/src/Makefile b/configs/ekk-lm3s9b96/src/Makefile
index c6af87d900c..9f4a781c3a6 100644
--- a/configs/ekk-lm3s9b96/src/Makefile
+++ b/configs/ekk-lm3s9b96/src/Makefile
@@ -36,52 +36,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += lm_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ez80f910200kitg/src/Makefile b/configs/ez80f910200kitg/src/Makefile
index d0643561114..33b0864cfc6 100644
--- a/configs/ez80f910200kitg/src/Makefile
+++ b/configs/ez80f910200kitg/src/Makefile
@@ -35,56 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = ez80_lowinit.c ez80_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) `cygpath -w $<` -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ez80f910200zco/src/Makefile b/configs/ez80f910200zco/src/Makefile
index 16881894290..cea55660877 100644
--- a/configs/ez80f910200zco/src/Makefile
+++ b/configs/ez80f910200zco/src/Makefile
@@ -35,23 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = ez80_lowinit.c
 ifeq ($(CONFIG_ARCH_LEDS),y)
 CSRCS += ez80_leds.c
@@ -59,39 +43,5 @@ endif
 ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += ez80_buttons.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) `cygpath -w $<` -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/fire-stm32v2/nsh/Make.defs b/configs/fire-stm32v2/nsh/Make.defs
index 484196b7c26..e4a6a9a7f0b 100644
--- a/configs/fire-stm32v2/nsh/Make.defs
+++ b/configs/fire-stm32v2/nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/fire-stm32v2/src/Makefile b/configs/fire-stm32v2/src/Makefile
index d4b4aa548d3..87dd63bee07 100644
--- a/configs/fire-stm32v2/src/Makefile
+++ b/configs/fire-stm32v2/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c stm32_usbdev.c stm32_mmcsd.c
 
 ifeq ($(CONFIG_STM32_FSMC),y)
@@ -84,43 +80,4 @@ ifeq ($(CONFIG_WATCHDOG),y)
 CSRCS += stm32_watchdog.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/freedom-kl25z/minnsh/Make.defs b/configs/freedom-kl25z/minnsh/Make.defs
index 04a0bf43a55..6672a5ecea0 100644
--- a/configs/freedom-kl25z/minnsh/Make.defs
+++ b/configs/freedom-kl25z/minnsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/freedom-kl25z/nsh/Make.defs b/configs/freedom-kl25z/nsh/Make.defs
index 2779708ebe5..1c3161e4e8c 100644
--- a/configs/freedom-kl25z/nsh/Make.defs
+++ b/configs/freedom-kl25z/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/freedom-kl25z/src/Makefile b/configs/freedom-kl25z/src/Makefile
index db5a142f549..2105da11019 100644
--- a/configs/freedom-kl25z/src/Makefile
+++ b/configs/freedom-kl25z/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = kl_boardinitialize.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -90,47 +86,4 @@ ifeq ($(CONFIG_SENSORS_ADXL345),y)
 CSRCS += kl_adxl345.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/freedom-kl26z/minnsh/Make.defs b/configs/freedom-kl26z/minnsh/Make.defs
index affd69755eb..099b656bbd7 100644
--- a/configs/freedom-kl26z/minnsh/Make.defs
+++ b/configs/freedom-kl26z/minnsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/freedom-kl26z/nsh/Make.defs b/configs/freedom-kl26z/nsh/Make.defs
index 1e3058e88ca..bb6cf92832b 100644
--- a/configs/freedom-kl26z/nsh/Make.defs
+++ b/configs/freedom-kl26z/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/freedom-kl26z/src/Makefile b/configs/freedom-kl26z/src/Makefile
index ce426e61f2f..863bf745718 100644
--- a/configs/freedom-kl26z/src/Makefile
+++ b/configs/freedom-kl26z/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = kl_boardinitialize.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -66,47 +62,4 @@ ifeq ($(CONFIG_PWM),y)
 CSRCS += kl_pwm.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/hymini-stm32v/buttons/Make.defs b/configs/hymini-stm32v/buttons/Make.defs
index 82c89cc04b0..96aa71fc212 100644
--- a/configs/hymini-stm32v/buttons/Make.defs
+++ b/configs/hymini-stm32v/buttons/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/nsh/Make.defs b/configs/hymini-stm32v/nsh/Make.defs
index b5438ae9594..7dede295b0e 100644
--- a/configs/hymini-stm32v/nsh/Make.defs
+++ b/configs/hymini-stm32v/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/nsh2/Make.defs b/configs/hymini-stm32v/nsh2/Make.defs
index 6f942d9e034..03d2a4a9050 100644
--- a/configs/hymini-stm32v/nsh2/Make.defs
+++ b/configs/hymini-stm32v/nsh2/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/src/Makefile b/configs/hymini-stm32v/src/Makefile
index 6f4216cf8ab..587bff4dabe 100644
--- a/configs/hymini-stm32v/src/Makefile
+++ b/configs/hymini-stm32v/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_buttons.c stm32_spi.c stm32_usbdev.c
 
 ifeq ($(CONFIG_LCD_SSD1289),y)
@@ -67,43 +63,4 @@ ifeq ($(CONFIG_WATCHDOG),y)
 CSRCS += stm32_watchdog.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/hymini-stm32v/usbmsc/Make.defs b/configs/hymini-stm32v/usbmsc/Make.defs
index 39511fc7c7e..e22debe60e0 100644
--- a/configs/hymini-stm32v/usbmsc/Make.defs
+++ b/configs/hymini-stm32v/usbmsc/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/usbnsh/Make.defs b/configs/hymini-stm32v/usbnsh/Make.defs
index 75531f58870..e6e6cb045ec 100644
--- a/configs/hymini-stm32v/usbnsh/Make.defs
+++ b/configs/hymini-stm32v/usbnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/usbserial/Make.defs b/configs/hymini-stm32v/usbserial/Make.defs
index 2ffbf193c08..c07c1961e91 100644
--- a/configs/hymini-stm32v/usbserial/Make.defs
+++ b/configs/hymini-stm32v/usbserial/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/kwikstik-k40/ostest/Make.defs b/configs/kwikstik-k40/ostest/Make.defs
index 68546dd9da3..11dd404db60 100644
--- a/configs/kwikstik-k40/ostest/Make.defs
+++ b/configs/kwikstik-k40/ostest/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/kwikstik-k40/src/Makefile b/configs/kwikstik-k40/src/Makefile
index 9dc769bb0de..59a2fe64082 100644
--- a/configs/kwikstik-k40/src/Makefile
+++ b/configs/kwikstik-k40/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = k40_boot.c k40_lcd.c k40_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -62,42 +58,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += k40_usbmsc.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-      -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-      -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lincoln60/netnsh/Make.defs b/configs/lincoln60/netnsh/Make.defs
index 31944df5794..1218ec37fe8 100644
--- a/configs/lincoln60/netnsh/Make.defs
+++ b/configs/lincoln60/netnsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lincoln60/nsh/Make.defs b/configs/lincoln60/nsh/Make.defs
index 5c9da6d3a92..1b91421c29b 100644
--- a/configs/lincoln60/nsh/Make.defs
+++ b/configs/lincoln60/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lincoln60/src/Makefile b/configs/lincoln60/src/Makefile
index a54083f1e51..9f9af80c0f1 100644
--- a/configs/lincoln60/src/Makefile
+++ b/configs/lincoln60/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c
 
@@ -52,44 +50,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += lpc17_buttons.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lincoln60/thttpd-binfs/Make.defs b/configs/lincoln60/thttpd-binfs/Make.defs
index 3a61d891a22..0f6e0ec7668 100644
--- a/configs/lincoln60/thttpd-binfs/Make.defs
+++ b/configs/lincoln60/thttpd-binfs/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6432-s2e/nsh/Make.defs b/configs/lm3s6432-s2e/nsh/Make.defs
index 08ba4f596d0..944c269ae5e 100644
--- a/configs/lm3s6432-s2e/nsh/Make.defs
+++ b/configs/lm3s6432-s2e/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6432-s2e/src/Makefile b/configs/lm3s6432-s2e/src/Makefile
index 683498fba0f..792180ba688 100644
--- a/configs/lm3s6432-s2e/src/Makefile
+++ b/configs/lm3s6432-s2e/src/Makefile
@@ -35,52 +35,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += lm_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lm3s6965-ek/discover/Make.defs b/configs/lm3s6965-ek/discover/Make.defs
index c81cebf75f0..f9439afefd5 100644
--- a/configs/lm3s6965-ek/discover/Make.defs
+++ b/configs/lm3s6965-ek/discover/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6965-ek/nsh/Make.defs b/configs/lm3s6965-ek/nsh/Make.defs
index 502c967724d..d82c8d5dc3e 100644
--- a/configs/lm3s6965-ek/nsh/Make.defs
+++ b/configs/lm3s6965-ek/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6965-ek/nx/Make.defs b/configs/lm3s6965-ek/nx/Make.defs
index daf30037c68..afec54a133e 100644
--- a/configs/lm3s6965-ek/nx/Make.defs
+++ b/configs/lm3s6965-ek/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6965-ek/src/Makefile b/configs/lm3s6965-ek/src/Makefile
index 2f21a28a426..17fbd08f9a9 100644
--- a/configs/lm3s6965-ek/src/Makefile
+++ b/configs/lm3s6965-ek/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -49,43 +46,4 @@ ifeq ($(CONFIG_NX_LCDDRIVER),y)
 CSRCS += lm_oled.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lm3s6965-ek/tcpecho/Make.defs b/configs/lm3s6965-ek/tcpecho/Make.defs
index 3b1c12a44d9..a7ea87a1e25 100644
--- a/configs/lm3s6965-ek/tcpecho/Make.defs
+++ b/configs/lm3s6965-ek/tcpecho/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s8962-ek/nsh/Make.defs b/configs/lm3s8962-ek/nsh/Make.defs
index 610fd2ca8e4..e6a44d123e8 100644
--- a/configs/lm3s8962-ek/nsh/Make.defs
+++ b/configs/lm3s8962-ek/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s8962-ek/nx/Make.defs b/configs/lm3s8962-ek/nx/Make.defs
index c6e361f8dc5..518493070a9 100644
--- a/configs/lm3s8962-ek/nx/Make.defs
+++ b/configs/lm3s8962-ek/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s8962-ek/src/Makefile b/configs/lm3s8962-ek/src/Makefile
index 3ef8dc86d9d..a49ed3f602c 100644
--- a/configs/lm3s8962-ek/src/Makefile
+++ b/configs/lm3s8962-ek/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -49,43 +46,4 @@ ifeq ($(CONFIG_NX_LCDDRIVER),y)
 CSRCS += lm_oled.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lm4f120-launchpad/nsh/Make.defs b/configs/lm4f120-launchpad/nsh/Make.defs
index 8b9a9b92626..9b1726d20c9 100644
--- a/configs/lm4f120-launchpad/nsh/Make.defs
+++ b/configs/lm4f120-launchpad/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm4f120-launchpad/src/Makefile b/configs/lm4f120-launchpad/src/Makefile
index be5bc10f996..523122e3ca7 100644
--- a/configs/lm4f120-launchpad/src/Makefile
+++ b/configs/lm4f120-launchpad/src/Makefile
@@ -35,57 +35,15 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)/sched
-
-ASRCS		=
-AOBJS		= $(ASRCS:.S=$(OBJEXT))
-CSRCS		= lm4f_boot.c lm4f_ssi.c
+ASRCS =
+CSRCS = lm4f_boot.c lm4f_ssi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
-CSRCS		+= lm4f_autoleds.c
+CSRCS += lm4f_autoleds.c
 endif
 
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
-CSRCS		+= lm4f_nsh.c
+CSRCS += lm4f_nsh.c
 endif
 
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-  		   -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-  		   -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS	+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpc4330-xplorer/nsh/Make.defs b/configs/lpc4330-xplorer/nsh/Make.defs
index 03e76c68953..9236d219bd5 100644
--- a/configs/lpc4330-xplorer/nsh/Make.defs
+++ b/configs/lpc4330-xplorer/nsh/Make.defs
@@ -111,6 +111,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpc4330-xplorer/src/Makefile b/configs/lpc4330-xplorer/src/Makefile
index ece37206477..9401227b7c2 100644
--- a/configs/lpc4330-xplorer/src/Makefile
+++ b/configs/lpc4330-xplorer/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc43_boot.c
 
@@ -80,44 +78,4 @@ CSRCS += $(SPIFI_LIB)/spansion.c
 CSRCS += $(SPIFI_LIB)/winbond.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpc4357-evb/nsh/Make.defs b/configs/lpc4357-evb/nsh/Make.defs
index 791b924b8c0..a72563c67ec 100644
--- a/configs/lpc4357-evb/nsh/Make.defs
+++ b/configs/lpc4357-evb/nsh/Make.defs
@@ -111,6 +111,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpc4357-evb/src/Makefile b/configs/lpc4357-evb/src/Makefile
index 4003c061800..2e02f71ffb3 100644
--- a/configs/lpc4357-evb/src/Makefile
+++ b/configs/lpc4357-evb/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc43_boot.c
 
@@ -70,44 +68,4 @@ CSRCS += $(SPIFI_LIB)/spansion.c
 CSRCS += $(SPIFI_LIB)/winbond.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpcxpresso-lpc1115/minnsh/Make.defs b/configs/lpcxpresso-lpc1115/minnsh/Make.defs
index 9115a02d3a3..b8d442c3e8c 100644
--- a/configs/lpcxpresso-lpc1115/minnsh/Make.defs
+++ b/configs/lpcxpresso-lpc1115/minnsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1115/nsh/Make.defs b/configs/lpcxpresso-lpc1115/nsh/Make.defs
index 808136fcab0..fa87f7951e9 100644
--- a/configs/lpcxpresso-lpc1115/nsh/Make.defs
+++ b/configs/lpcxpresso-lpc1115/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1115/src/Makefile b/configs/lpcxpresso-lpc1115/src/Makefile
index 33a8499aa29..4091b1db745 100644
--- a/configs/lpcxpresso-lpc1115/src/Makefile
+++ b/configs/lpcxpresso-lpc1115/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = lpc11_boot.c
 
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
@@ -62,47 +58,4 @@ ifeq ($(CONFIG_PWM),y)
 CSRCS += lpc11_pwm.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpcxpresso-lpc1768/dhcpd/Make.defs b/configs/lpcxpresso-lpc1768/dhcpd/Make.defs
index 9dae0cb46a1..0b72559b4e3 100644
--- a/configs/lpcxpresso-lpc1768/dhcpd/Make.defs
+++ b/configs/lpcxpresso-lpc1768/dhcpd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1768/nsh/Make.defs b/configs/lpcxpresso-lpc1768/nsh/Make.defs
index fd38611675b..f48872f4710 100644
--- a/configs/lpcxpresso-lpc1768/nsh/Make.defs
+++ b/configs/lpcxpresso-lpc1768/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1768/nx/Make.defs b/configs/lpcxpresso-lpc1768/nx/Make.defs
index 778e1a9dc3e..6c15ebb03b0 100644
--- a/configs/lpcxpresso-lpc1768/nx/Make.defs
+++ b/configs/lpcxpresso-lpc1768/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1768/src/Makefile b/configs/lpcxpresso-lpc1768/src/Makefile
index 10783d92b55..b06b116f1fc 100644
--- a/configs/lpcxpresso-lpc1768/src/Makefile
+++ b/configs/lpcxpresso-lpc1768/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c lpc17_ssp.c lpc17_adc.c lpc17_dac.c lpc17_pwm.c
 
@@ -52,44 +50,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += lpc17_usbmsc.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpcxpresso-lpc1768/thttpd/Make.defs b/configs/lpcxpresso-lpc1768/thttpd/Make.defs
index d8edc436f99..45aeb2dbf90 100644
--- a/configs/lpcxpresso-lpc1768/thttpd/Make.defs
+++ b/configs/lpcxpresso-lpc1768/thttpd/Make.defs
@@ -96,6 +96,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1768/usbmsc/Make.defs b/configs/lpcxpresso-lpc1768/usbmsc/Make.defs
index 8ed5206c944..02a52dc912c 100644
--- a/configs/lpcxpresso-lpc1768/usbmsc/Make.defs
+++ b/configs/lpcxpresso-lpc1768/usbmsc/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/maple/nsh/Make.defs b/configs/maple/nsh/Make.defs
index 1ec9da20559..3ef9a5ab421 100644
--- a/configs/maple/nsh/Make.defs
+++ b/configs/maple/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/maple/nx/Make.defs b/configs/maple/nx/Make.defs
index e1cf55ee2a8..19348786b49 100644
--- a/configs/maple/nx/Make.defs
+++ b/configs/maple/nx/Make.defs
@@ -95,6 +95,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/maple/src/Makefile b/configs/maple/src/Makefile
index 18a3e3eb05f..5c5269512da 100644
--- a/configs/maple/src/Makefile
+++ b/configs/maple/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_usbdev.c stm32_spi.c
 
 ifeq ($(CONFIG_NX_LCDDRIVER),y)
@@ -60,43 +56,4 @@ ifeq ($(CONFIG_WATCHDOG),y)
 CSRCS += stm32_watchdog.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/maple/usbnsh/Make.defs b/configs/maple/usbnsh/Make.defs
index ba71fde809d..b9c0e2e75b9 100644
--- a/configs/maple/usbnsh/Make.defs
+++ b/configs/maple/usbnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mbed/hidkbd/Make.defs b/configs/mbed/hidkbd/Make.defs
index a8e06985773..b2a0c537415 100644
--- a/configs/mbed/hidkbd/Make.defs
+++ b/configs/mbed/hidkbd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mbed/nsh/Make.defs b/configs/mbed/nsh/Make.defs
index d66a97ea53f..c252ff3f667 100644
--- a/configs/mbed/nsh/Make.defs
+++ b/configs/mbed/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mbed/src/Makefile b/configs/mbed/src/Makefile
index f6350eca7ed..23720ddfc80 100644
--- a/configs/mbed/src/Makefile
+++ b/configs/mbed/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c lpc17_adc.c lpc17_dac.c lpc17_pwm.c
 
@@ -51,44 +49,4 @@ ifeq ($(CONFIG_EXAMPLES_HIDKBD),y)
 CSRCS += lpc17_hidkbd.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mcu123-lpc214x/composite/Make.defs b/configs/mcu123-lpc214x/composite/Make.defs
index 970e5057a20..c53b9a8d683 100644
--- a/configs/mcu123-lpc214x/composite/Make.defs
+++ b/configs/mcu123-lpc214x/composite/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mcu123-lpc214x/nsh/Make.defs b/configs/mcu123-lpc214x/nsh/Make.defs
index 0fa633a05fd..8abeb261bf5 100644
--- a/configs/mcu123-lpc214x/nsh/Make.defs
+++ b/configs/mcu123-lpc214x/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mcu123-lpc214x/src/Makefile b/configs/mcu123-lpc214x/src/Makefile
index 6dfe6b638a4..349988fe2bc 100644
--- a/configs/mcu123-lpc214x/src/Makefile
+++ b/configs/mcu123-lpc214x/src/Makefile
@@ -35,18 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/sched}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm -I$(TOPDIR)/sched
-endif
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lpc2148_spi1.c lpc2148_leds.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -61,36 +50,4 @@ ifeq ($(CONFIG_USBDEV_COMPOSITE),y)
 CSRCS += lpc2148_composite.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-CFLAGS += -I $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mcu123-lpc214x/usbmsc/Make.defs b/configs/mcu123-lpc214x/usbmsc/Make.defs
index aa543a24bbe..fe42b1e1335 100644
--- a/configs/mcu123-lpc214x/usbmsc/Make.defs
+++ b/configs/mcu123-lpc214x/usbmsc/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mcu123-lpc214x/usbserial/Make.defs b/configs/mcu123-lpc214x/usbserial/Make.defs
index 877f73e5c5e..c667513ca02 100644
--- a/configs/mcu123-lpc214x/usbserial/Make.defs
+++ b/configs/mcu123-lpc214x/usbserial/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/micropendous3/hello/Make.defs b/configs/micropendous3/hello/Make.defs
index f2b72a77edd..8cda43d830a 100644
--- a/configs/micropendous3/hello/Make.defs
+++ b/configs/micropendous3/hello/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/micropendous3/src/Makefile b/configs/micropendous3/src/Makefile
index 4e3743ff98e..e8027c9f1fe 100644
--- a/configs/micropendous3/src/Makefile
+++ b/configs/micropendous3/src/Makefile
@@ -42,55 +42,4 @@ ifeq ($(CONFIG_ARCH_LEDS),y)
 CSRCS += at90usb_leds.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_ARCH_FAMILY_AVR32),y)
-ARCH_SUBDIR = avr32
-endif
-ifeq ($(CONFIG_ARCH_FAMILY_AVR),y)
-ARCH_SUBDIR = avr
-endif
-
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}"
-else
-  CFLAGS += -I "$(TOPDIR)/sched"
-  CFLAGS += -I "$(ARCH_SRCDIR)/chip"
-  CFLAGS += -I "$(ARCH_SRCDIR)/common"
-  CFLAGS += -I "$(ARCH_SRCDIR)/$(ARCH_SUBDIR)"
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mikroe-stm32f4/fulldemo/Make.defs b/configs/mikroe-stm32f4/fulldemo/Make.defs
index 3f4dd54efce..e6cc4728215 100644
--- a/configs/mikroe-stm32f4/fulldemo/Make.defs
+++ b/configs/mikroe-stm32f4/fulldemo/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/kostest/Make.defs b/configs/mikroe-stm32f4/kostest/Make.defs
index 2e1cdc00249..116f4b5cb02 100644
--- a/configs/mikroe-stm32f4/kostest/Make.defs
+++ b/configs/mikroe-stm32f4/kostest/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/nsh/Make.defs b/configs/mikroe-stm32f4/nsh/Make.defs
index 03d11b36902..d71376f341c 100644
--- a/configs/mikroe-stm32f4/nsh/Make.defs
+++ b/configs/mikroe-stm32f4/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/nx/Make.defs b/configs/mikroe-stm32f4/nx/Make.defs
index 3f4dd54efce..e6cc4728215 100644
--- a/configs/mikroe-stm32f4/nx/Make.defs
+++ b/configs/mikroe-stm32f4/nx/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/nxlines/Make.defs b/configs/mikroe-stm32f4/nxlines/Make.defs
index 3f4dd54efce..e6cc4728215 100644
--- a/configs/mikroe-stm32f4/nxlines/Make.defs
+++ b/configs/mikroe-stm32f4/nxlines/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/nxtext/Make.defs b/configs/mikroe-stm32f4/nxtext/Make.defs
index 3f4dd54efce..e6cc4728215 100644
--- a/configs/mikroe-stm32f4/nxtext/Make.defs
+++ b/configs/mikroe-stm32f4/nxtext/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/src/Makefile b/configs/mikroe-stm32f4/src/Makefile
index e8addfd49e6..2b6a6dac2d7 100644
--- a/configs/mikroe-stm32f4/src/Makefile
+++ b/configs/mikroe-stm32f4/src/Makefile
@@ -39,11 +39,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -102,47 +98,4 @@ ifeq ($(CONFIG_VS1053),y)
 CSRCS += stm32_vs1053.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mikroe-stm32f4/usbnsh/Make.defs b/configs/mikroe-stm32f4/usbnsh/Make.defs
index 3f4dd54efce..e6cc4728215 100644
--- a/configs/mikroe-stm32f4/usbnsh/Make.defs
+++ b/configs/mikroe-stm32f4/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mirtoo/nsh/Make.defs b/configs/mirtoo/nsh/Make.defs
index bfa05caed87..064c83a97fb 100644
--- a/configs/mirtoo/nsh/Make.defs
+++ b/configs/mirtoo/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mirtoo/nxffs/Make.defs b/configs/mirtoo/nxffs/Make.defs
index 3181965e020..94e8a7d4c1b 100644
--- a/configs/mirtoo/nxffs/Make.defs
+++ b/configs/mirtoo/nxffs/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mirtoo/src/Makefile b/configs/mirtoo/src/Makefile
index bdd72ec53f1..8de21701830 100644
--- a/configs/mirtoo/src/Makefile
+++ b/configs/mirtoo/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32_boot.c pic32_leds.c
 
@@ -52,44 +50,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += pic32_nsh.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/moteino-mega/hello/Make.defs b/configs/moteino-mega/hello/Make.defs
index 8e841482166..f4454c64d93 100644
--- a/configs/moteino-mega/hello/Make.defs
+++ b/configs/moteino-mega/hello/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/moteino-mega/nsh/Make.defs b/configs/moteino-mega/nsh/Make.defs
index 6376d9c7864..05017108f21 100644
--- a/configs/moteino-mega/nsh/Make.defs
+++ b/configs/moteino-mega/nsh/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/moteino-mega/src/Makefile b/configs/moteino-mega/src/Makefile
index 6d95aff4368..703e8b9c47a 100644
--- a/configs/moteino-mega/src/Makefile
+++ b/configs/moteino-mega/src/Makefile
@@ -35,62 +35,11 @@
 
 -include $(TOPDIR)/Make.defs
 
-ASRCS		=
-CSRCS		= avr_boot.c
+ASRCS =
+CSRCS = avr_boot.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
-CSRCS		+= avr_leds.c
+CSRCS += avr_leds.c
 endif
 
-AOBJS		= $(ASRCS:.S=$(OBJEXT))
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_ARCH_FAMILY_AVR32),y)
-ARCH_SUBDIR	= avr32
-endif
-ifeq ($(CONFIG_ARCH_FAMILY_AVR),y)
-ARCH_SUBDIR	= avr
-endif
-
-ifeq ($(WINTOOL),y)
-  CFLAGS	+= -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}"
-else
-  CFLAGS	+= -I "$(TOPDIR)/sched"
-  CFLAGS	+= -I "$(ARCH_SRCDIR)/chip"
-  CFLAGS	+= -I "$(ARCH_SRCDIR)/common"
-  CFLAGS	+= -I "$(ARCH_SRCDIR)/$(ARCH_SUBDIR)"
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/moxa/nsh/Make.defs b/configs/moxa/nsh/Make.defs
index f95a38b6af8..54e28cc725d 100644
--- a/configs/moxa/nsh/Make.defs
+++ b/configs/moxa/nsh/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/moxa/src/Makefile b/configs/moxa/src/Makefile
index 598ae010585..60543b6e53c 100644
--- a/configs/moxa/src/Makefile
+++ b/configs/moxa/src/Makefile
@@ -35,56 +35,11 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = moxart_boot.c
 
 ifeq ($(CONFIG_NSH_LIBRARY),y)
 CSRCS += moxart_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mx1ads/ostest/Make.defs b/configs/mx1ads/ostest/Make.defs
index 3bc23e60ede..048994dccc2 100644
--- a/configs/mx1ads/ostest/Make.defs
+++ b/configs/mx1ads/ostest/Make.defs
@@ -90,6 +90,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/mx1ads/src/Makefile b/configs/mx1ads/src/Makefile
index db0ffb0f102..49c34fa7476 100644
--- a/configs/mx1ads/src/Makefile
+++ b/configs/mx1ads/src/Makefile
@@ -35,42 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = mx1_boot.c mx1_leds.c mx1_network.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ne64badge/ostest/Make.defs b/configs/ne64badge/ostest/Make.defs
index b03f2fe3f66..824e0b07f69 100644
--- a/configs/ne64badge/ostest/Make.defs
+++ b/configs/ne64badge/ostest/Make.defs
@@ -110,6 +110,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ne64badge/src/Makefile b/configs/ne64badge/src/Makefile
index 74c95f3c803..28db5cf58b5 100644
--- a/configs/ne64badge/src/Makefile
+++ b/configs/ne64badge/src/Makefile
@@ -35,51 +35,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = m9s12_boot.c m9s12_leds.c m9s12_buttons.c m9s12_spi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += m9s12_nsh.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ntosd-dm320/nettest/Make.defs b/configs/ntosd-dm320/nettest/Make.defs
index c967ff935f5..e6007dac659 100644
--- a/configs/ntosd-dm320/nettest/Make.defs
+++ b/configs/ntosd-dm320/nettest/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/nsh/Make.defs b/configs/ntosd-dm320/nsh/Make.defs
index 8ea4fe35526..90e0430b3b3 100644
--- a/configs/ntosd-dm320/nsh/Make.defs
+++ b/configs/ntosd-dm320/nsh/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/poll/Make.defs b/configs/ntosd-dm320/poll/Make.defs
index 1fce2bbcad4..c37f8810632 100644
--- a/configs/ntosd-dm320/poll/Make.defs
+++ b/configs/ntosd-dm320/poll/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/src/Makefile b/configs/ntosd-dm320/src/Makefile
index 5a99d7d25e9..9c09281a2c6 100644
--- a/configs/ntosd-dm320/src/Makefile
+++ b/configs/ntosd-dm320/src/Makefile
@@ -35,50 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = dm320_leds.c dm320_network.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ntosd-dm320/thttpd/Make.defs b/configs/ntosd-dm320/thttpd/Make.defs
index c89fae70944..2f1bd4187cd 100644
--- a/configs/ntosd-dm320/thttpd/Make.defs
+++ b/configs/ntosd-dm320/thttpd/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/udp/Make.defs b/configs/ntosd-dm320/udp/Make.defs
index 847b040b273..7b42cf54353 100644
--- a/configs/ntosd-dm320/udp/Make.defs
+++ b/configs/ntosd-dm320/udp/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/webserver/Make.defs b/configs/ntosd-dm320/webserver/Make.defs
index 085430b7298..62e276d30d2 100644
--- a/configs/ntosd-dm320/webserver/Make.defs
+++ b/configs/ntosd-dm320/webserver/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/nucleo-f4x1re/f401-nsh/Make.defs b/configs/nucleo-f4x1re/f401-nsh/Make.defs
index 21bdd584a7b..e91049133d1 100644
--- a/configs/nucleo-f4x1re/f401-nsh/Make.defs
+++ b/configs/nucleo-f4x1re/f401-nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nucleo-f4x1re/f411-nsh/Make.defs b/configs/nucleo-f4x1re/f411-nsh/Make.defs
index 3b8e9354126..c0586110f0f 100755
--- a/configs/nucleo-f4x1re/f411-nsh/Make.defs
+++ b/configs/nucleo-f4x1re/f411-nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nucleo-f4x1re/src/Makefile b/configs/nucleo-f4x1re/src/Makefile
index e2ff50b6dd0..27bcc28e391 100644
--- a/configs/nucleo-f4x1re/src/Makefile
+++ b/configs/nucleo-f4x1re/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
-ASRCS = 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
+ASRCS =
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -74,43 +70,4 @@ ifeq ($(CONFIG_NSH_LIBRARY),y)
 CSRCS += stm32_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/nucleus2g/nsh/Make.defs b/configs/nucleus2g/nsh/Make.defs
index 33bfbf648f8..cfb3146e691 100644
--- a/configs/nucleus2g/nsh/Make.defs
+++ b/configs/nucleus2g/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nucleus2g/src/Makefile b/configs/nucleus2g/src/Makefile
index 523deed3c37..868e68d3f2d 100644
--- a/configs/nucleus2g/src/Makefile
+++ b/configs/nucleus2g/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c lpc17_ssp.c lpc17_outputs.c
 
@@ -48,44 +46,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += lpc17_usbmsc.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/nucleus2g/usbmsc/Make.defs b/configs/nucleus2g/usbmsc/Make.defs
index 53e1fd39c6d..4db7649a7bd 100644
--- a/configs/nucleus2g/usbmsc/Make.defs
+++ b/configs/nucleus2g/usbmsc/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nucleus2g/usbserial/Make.defs b/configs/nucleus2g/usbserial/Make.defs
index 0a3c7275cf4..f7a4435fbe6 100644
--- a/configs/nucleus2g/usbserial/Make.defs
+++ b/configs/nucleus2g/usbserial/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nutiny-nuc120/nsh/Make.defs b/configs/nutiny-nuc120/nsh/Make.defs
index 066f0c3fd0f..149b98be016 100644
--- a/configs/nutiny-nuc120/nsh/Make.defs
+++ b/configs/nutiny-nuc120/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nutiny-nuc120/src/Makefile b/configs/nutiny-nuc120/src/Makefile
index 92fbae7030a..423a07b0468 100644
--- a/configs/nutiny-nuc120/src/Makefile
+++ b/configs/nutiny-nuc120/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = nuc_boardinitialize.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -70,47 +66,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += nuc_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-efm32g880f128-stk/nsh/Make.defs b/configs/olimex-efm32g880f128-stk/nsh/Make.defs
index 8a8f6ca52ba..a089cda7fa5 100644
--- a/configs/olimex-efm32g880f128-stk/nsh/Make.defs
+++ b/configs/olimex-efm32g880f128-stk/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-efm32g880f128-stk/src/Makefile b/configs/olimex-efm32g880f128-stk/src/Makefile
index 6428fdddff8..413781b4114 100644
--- a/configs/olimex-efm32g880f128-stk/src/Makefile
+++ b/configs/olimex-efm32g880f128-stk/src/Makefile
@@ -35,47 +35,11 @@
 
 -include $(TOPDIR)/Make.defs
 
+ASRCS =
 CSRCS = efm32_boot.c
 
 ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += efm32_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-lpc-h3131/nsh/Make.defs b/configs/olimex-lpc-h3131/nsh/Make.defs
index cdb31968657..fc8e9c1cc00 100644
--- a/configs/olimex-lpc-h3131/nsh/Make.defs
+++ b/configs/olimex-lpc-h3131/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc-h3131/src/Makefile b/configs/olimex-lpc-h3131/src/Makefile
index 63000780381..12ec7fa71bb 100644
--- a/configs/olimex-lpc-h3131/src/Makefile
+++ b/configs/olimex-lpc-h3131/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = lpc31_boot.c lpc31_clkinit.c
 
 ifeq ($(CONFIG_LPC31_EXTDRAM),y)
@@ -71,41 +67,4 @@ endif
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-lpc1766stk/ftpc/Make.defs b/configs/olimex-lpc1766stk/ftpc/Make.defs
index 1bcbf365c63..75a9ffed5ef 100644
--- a/configs/olimex-lpc1766stk/ftpc/Make.defs
+++ b/configs/olimex-lpc1766stk/ftpc/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/hidkbd/Make.defs b/configs/olimex-lpc1766stk/hidkbd/Make.defs
index 438d323a5d6..6ceacd9b282 100644
--- a/configs/olimex-lpc1766stk/hidkbd/Make.defs
+++ b/configs/olimex-lpc1766stk/hidkbd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/hidmouse/Make.defs b/configs/olimex-lpc1766stk/hidmouse/Make.defs
index 7337b498e61..f2b03c95d70 100644
--- a/configs/olimex-lpc1766stk/hidmouse/Make.defs
+++ b/configs/olimex-lpc1766stk/hidmouse/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/nettest/Make.defs b/configs/olimex-lpc1766stk/nettest/Make.defs
index 2b09e4cbc90..4483476376e 100644
--- a/configs/olimex-lpc1766stk/nettest/Make.defs
+++ b/configs/olimex-lpc1766stk/nettest/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/nsh/Make.defs b/configs/olimex-lpc1766stk/nsh/Make.defs
index 1bfe9931c61..dbb8a31e4c2 100644
--- a/configs/olimex-lpc1766stk/nsh/Make.defs
+++ b/configs/olimex-lpc1766stk/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/nx/Make.defs b/configs/olimex-lpc1766stk/nx/Make.defs
index 3db1d362f41..5b4c021a67c 100644
--- a/configs/olimex-lpc1766stk/nx/Make.defs
+++ b/configs/olimex-lpc1766stk/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/slip-httpd/Make.defs b/configs/olimex-lpc1766stk/slip-httpd/Make.defs
index 42ff8c2c632..04967db88fd 100644
--- a/configs/olimex-lpc1766stk/slip-httpd/Make.defs
+++ b/configs/olimex-lpc1766stk/slip-httpd/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/src/Makefile b/configs/olimex-lpc1766stk/src/Makefile
index eb6f7b14054..0fe8d8a40ba 100644
--- a/configs/olimex-lpc1766stk/src/Makefile
+++ b/configs/olimex-lpc1766stk/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c lpc17_ssp.c
 
@@ -68,44 +66,4 @@ ifeq ($(CONFIG_USBHOST_HIDMOUSE),y)
 CSRCS += lpc17_hidmouse.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-lpc1766stk/thttpd-binfs/Make.defs b/configs/olimex-lpc1766stk/thttpd-binfs/Make.defs
index f8487afe958..01abf882dba 100644
--- a/configs/olimex-lpc1766stk/thttpd-binfs/Make.defs
+++ b/configs/olimex-lpc1766stk/thttpd-binfs/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/thttpd-nxflat/Make.defs b/configs/olimex-lpc1766stk/thttpd-nxflat/Make.defs
index 5feb1a650d8..a4ba6f8c2b6 100644
--- a/configs/olimex-lpc1766stk/thttpd-nxflat/Make.defs
+++ b/configs/olimex-lpc1766stk/thttpd-nxflat/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/usbmsc/Make.defs b/configs/olimex-lpc1766stk/usbmsc/Make.defs
index 11643932bdd..12ce4594ec5 100644
--- a/configs/olimex-lpc1766stk/usbmsc/Make.defs
+++ b/configs/olimex-lpc1766stk/usbmsc/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/usbserial/Make.defs b/configs/olimex-lpc1766stk/usbserial/Make.defs
index 1bfc62f7ba5..f50e4993e34 100644
--- a/configs/olimex-lpc1766stk/usbserial/Make.defs
+++ b/configs/olimex-lpc1766stk/usbserial/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/zmodem/Make.defs b/configs/olimex-lpc1766stk/zmodem/Make.defs
index 62dda435dca..783511e2036 100644
--- a/configs/olimex-lpc1766stk/zmodem/Make.defs
+++ b/configs/olimex-lpc1766stk/zmodem/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc2378/nsh/Make.defs b/configs/olimex-lpc2378/nsh/Make.defs
index f9fa9618a00..416160dde7b 100644
--- a/configs/olimex-lpc2378/nsh/Make.defs
+++ b/configs/olimex-lpc2378/nsh/Make.defs
@@ -112,6 +112,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc2378/src/Makefile b/configs/olimex-lpc2378/src/Makefile
index a10e2b07dc9..9ed1c7b44b7 100644
--- a/configs/olimex-lpc2378/src/Makefile
+++ b/configs/olimex-lpc2378/src/Makefile
@@ -40,54 +40,11 @@
 
 -include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/sched}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm -I$(TOPDIR)/sched
-endif
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lpc2378_leds.c
 
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += lpc2378_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-CFLAGS += -I $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-stm32-h405/nshusb/Make.defs b/configs/olimex-stm32-h405/nshusb/Make.defs
index 6363d54846a..93e2805ca3e 100644
--- a/configs/olimex-stm32-h405/nshusb/Make.defs
+++ b/configs/olimex-stm32-h405/nshusb/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-stm32-h405/src/Makefile b/configs/olimex-stm32-h405/src/Makefile
index 28f47119a10..fd1cb5dd26b 100644
--- a/configs/olimex-stm32-h405/src/Makefile
+++ b/configs/olimex-stm32-h405/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_cxxinitialize.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -68,43 +64,4 @@ ifeq ($(CONFIG_CAN),y)
 CSRCS += stm32_can.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-stm32-p107/nsh/Make.defs b/configs/olimex-stm32-p107/nsh/Make.defs
index dcf1dc5b073..b373158edb3 100644
--- a/configs/olimex-stm32-p107/nsh/Make.defs
+++ b/configs/olimex-stm32-p107/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-stm32-p107/src/Makefile b/configs/olimex-stm32-p107/src/Makefile
index ab24d866051..9d4acd16978 100644
--- a/configs/olimex-stm32-p107/src/Makefile
+++ b/configs/olimex-stm32-p107/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_CAN),y)
@@ -50,43 +46,4 @@ ifeq ($(CONFIG_ENCX24J600),y)
 CSRCS += stm32_encx24j600.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-stm32-p207/nsh/Make.defs b/configs/olimex-stm32-p207/nsh/Make.defs
index 627832fba53..f6423328b80 100644
--- a/configs/olimex-stm32-p207/nsh/Make.defs
+++ b/configs/olimex-stm32-p207/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-stm32-p207/src/Makefile b/configs/olimex-stm32-p207/src/Makefile
index fb40a97df72..5d5629eaded 100644
--- a/configs/olimex-stm32-p207/src/Makefile
+++ b/configs/olimex-stm32-p207/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_cxxinitialize.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -68,43 +64,4 @@ ifeq ($(CONFIG_CAN),y)
 CSRCS += stm32_can.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-strp711/nettest/Make.defs b/configs/olimex-strp711/nettest/Make.defs
index b62f147179b..cd4e7d2476c 100644
--- a/configs/olimex-strp711/nettest/Make.defs
+++ b/configs/olimex-strp711/nettest/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-strp711/nsh/Make.defs b/configs/olimex-strp711/nsh/Make.defs
index 68fc8e48ff6..dd312dbc332 100644
--- a/configs/olimex-strp711/nsh/Make.defs
+++ b/configs/olimex-strp711/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-strp711/src/Makefile b/configs/olimex-strp711/src/Makefile
index 74f13a0a4b4..8c7285a21e6 100644
--- a/configs/olimex-strp711/src/Makefile
+++ b/configs/olimex-strp711/src/Makefile
@@ -35,18 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/sched}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm -I$(TOPDIR)/sched
-endif
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = str71_spi.c str71_leds.c str71_buttons.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += str71_nsh.c
@@ -54,36 +43,5 @@ endif
 ifeq ($(CONFIG_ENC28J60),y)
 CSRCS += str71_enc28j60.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-CFLAGS += -I $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimexino-stm32/can/Make.defs b/configs/olimexino-stm32/can/Make.defs
index 5fc1886c8ab..0af35807771 100644
--- a/configs/olimexino-stm32/can/Make.defs
+++ b/configs/olimexino-stm32/can/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimexino-stm32/composite/Make.defs b/configs/olimexino-stm32/composite/Make.defs
index f88def2429a..74174e4db6e 100644
--- a/configs/olimexino-stm32/composite/Make.defs
+++ b/configs/olimexino-stm32/composite/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimexino-stm32/nsh/Make.defs b/configs/olimexino-stm32/nsh/Make.defs
index fe41f6b4da6..b43cc376a83 100644
--- a/configs/olimexino-stm32/nsh/Make.defs
+++ b/configs/olimexino-stm32/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimexino-stm32/smallnsh/Make.defs b/configs/olimexino-stm32/smallnsh/Make.defs
index 455f2ff7ae0..943285a712e 100644
--- a/configs/olimexino-stm32/smallnsh/Make.defs
+++ b/configs/olimexino-stm32/smallnsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimexino-stm32/src/Makefile b/configs/olimexino-stm32/src/Makefile
index caa73649477..a36bca75e44 100644
--- a/configs/olimexino-stm32/src/Makefile
+++ b/configs/olimexino-stm32/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c stm32_leds.c
 
 ifeq ($(CONFIG_CAN),y)
@@ -70,43 +66,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += stm32_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimexino-stm32/tiny/Make.defs b/configs/olimexino-stm32/tiny/Make.defs
index 36850ec7154..fa53ac64da6 100644
--- a/configs/olimexino-stm32/tiny/Make.defs
+++ b/configs/olimexino-stm32/tiny/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/open1788/knsh/Make.defs b/configs/open1788/knsh/Make.defs
index c6ad8434f2c..0274b16c744 100644
--- a/configs/open1788/knsh/Make.defs
+++ b/configs/open1788/knsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/open1788/nsh/Make.defs b/configs/open1788/nsh/Make.defs
index 617d4458a2d..1139dd85a85 100644
--- a/configs/open1788/nsh/Make.defs
+++ b/configs/open1788/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/open1788/nxlines/Make.defs b/configs/open1788/nxlines/Make.defs
index 5ab07f07aba..be8f8c7fffb 100644
--- a/configs/open1788/nxlines/Make.defs
+++ b/configs/open1788/nxlines/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/open1788/src/Makefile b/configs/open1788/src/Makefile
index 669d61a08b2..8172a2027f6 100644
--- a/configs/open1788/src/Makefile
+++ b/configs/open1788/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boardinitialize.c lpc17_ssp.c
 
@@ -76,46 +74,4 @@ ifeq ($(CONFIG_INPUT_ADS7843E),y)
   CSRCS += lpc17_touchscreen.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/p112/src/Makefile b/configs/p112/src/Makefile
index 377910e23d1..57e263690b6 100644
--- a/configs/p112/src/Makefile
+++ b/configs/p112/src/Makefile
@@ -35,43 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)$(DELIM)sched
-CFLAGS		+= -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)common
-CFLAGS		+= -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)z180
+ASRCS =
+CSRCS =
 
-ASRCS		=
-AOBJS		= $(ASRCS:$(ASMEXT)=$(OBJEXT))
-CSRCS		=
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-CFLAGS		+= -I $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pcblogic-pic32mx/nsh/Make.defs b/configs/pcblogic-pic32mx/nsh/Make.defs
index e0209a3990f..ec72928785e 100644
--- a/configs/pcblogic-pic32mx/nsh/Make.defs
+++ b/configs/pcblogic-pic32mx/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pcblogic-pic32mx/src/Makefile b/configs/pcblogic-pic32mx/src/Makefile
index bef17a3bf08..bc7ab00f5bb 100644
--- a/configs/pcblogic-pic32mx/src/Makefile
+++ b/configs/pcblogic-pic32mx/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32mx_boot.c
 
@@ -48,44 +46,4 @@ ifeq ($(CONFIG_LCD_LCD1602),y)
 CSRCS += pic32mx_lcd1602.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pcduino-a10/nsh/Make.defs b/configs/pcduino-a10/nsh/Make.defs
index 027e57d3549..5c5a9aa9d0b 100644
--- a/configs/pcduino-a10/nsh/Make.defs
+++ b/configs/pcduino-a10/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pcduino-a10/src/Makefile b/configs/pcduino-a10/src/Makefile
index c7775da4214..5112b67ebf7 100644
--- a/configs/pcduino-a10/src/Makefile
+++ b/configs/pcduino-a10/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = a1x_boot.c a1x_leds.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -54,45 +50,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += a1x_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-a}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-a
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pic32mx-starterkit/nsh/Make.defs b/configs/pic32mx-starterkit/nsh/Make.defs
index 92dd1a4d524..2877aeabdef 100644
--- a/configs/pic32mx-starterkit/nsh/Make.defs
+++ b/configs/pic32mx-starterkit/nsh/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pic32mx-starterkit/nsh2/Make.defs b/configs/pic32mx-starterkit/nsh2/Make.defs
index 5b6f1de4211..d9a702d6b3f 100644
--- a/configs/pic32mx-starterkit/nsh2/Make.defs
+++ b/configs/pic32mx-starterkit/nsh2/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pic32mx-starterkit/src/Makefile b/configs/pic32mx-starterkit/src/Makefile
index 7a5878e1294..d7ebe18d4bf 100644
--- a/configs/pic32mx-starterkit/src/Makefile
+++ b/configs/pic32mx-starterkit/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32mx_boot.c pic32mx_leds.c pic32mx_spi.c
 
@@ -55,44 +53,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += pic32mx_usbmsc.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pic32mx7mmb/nsh/Make.defs b/configs/pic32mx7mmb/nsh/Make.defs
index 1ae4c394fbd..747323a5db1 100644
--- a/configs/pic32mx7mmb/nsh/Make.defs
+++ b/configs/pic32mx7mmb/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pic32mx7mmb/src/Makefile b/configs/pic32mx7mmb/src/Makefile
index 73408883fb1..9b855fe380c 100644
--- a/configs/pic32mx7mmb/src/Makefile
+++ b/configs/pic32mx7mmb/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32_boot.c pic32_leds.c pic32_spi.c pic32_mio283qt2.c
 
@@ -59,44 +57,4 @@ ifeq ($(CONFIG_INPUT),y)
 CSRCS += pic32_touchscreen.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pic32mz-starterkit/nsh/Make.defs b/configs/pic32mz-starterkit/nsh/Make.defs
index 926b802de0d..3a9671d3bf0 100644
--- a/configs/pic32mz-starterkit/nsh/Make.defs
+++ b/configs/pic32mz-starterkit/nsh/Make.defs
@@ -125,6 +125,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pic32mz-starterkit/src/Makefile b/configs/pic32mz-starterkit/src/Makefile
index b2d52d99f16..128c862fb92 100644
--- a/configs/pic32mz-starterkit/src/Makefile
+++ b/configs/pic32mz-starterkit/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32mz_boot.c pic32mz_bringup.c pic32mz_spi.c
 
@@ -54,44 +52,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += pic32mz_nsh.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pirelli_dpl10/nsh_highram/Make.defs b/configs/pirelli_dpl10/nsh_highram/Make.defs
index 9e99f130a93..c337458c351 100644
--- a/configs/pirelli_dpl10/nsh_highram/Make.defs
+++ b/configs/pirelli_dpl10/nsh_highram/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pirelli_dpl10/src/Makefile b/configs/pirelli_dpl10/src/Makefile
index 50947694aa6..4026b5fb1c9 100644
--- a/configs/pirelli_dpl10/src/Makefile
+++ b/configs/pirelli_dpl10/src/Makefile
@@ -38,42 +38,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)/sched
+ASRCS =
+CSRCS = boot.c
 
-ASRCS		=
-AOBJS		= $(ASRCS:.S=$(OBJEXT))
-CSRCS		= boot.c
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-CFLAGS		+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/qemu-i486/nsh/Make.defs b/configs/qemu-i486/nsh/Make.defs
index 95c94ee3984..51cf548ee93 100644
--- a/configs/qemu-i486/nsh/Make.defs
+++ b/configs/qemu-i486/nsh/Make.defs
@@ -96,6 +96,7 @@ CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(A
 CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS = $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT = .elf
diff --git a/configs/qemu-i486/ostest/Make.defs b/configs/qemu-i486/ostest/Make.defs
index eed91af57f7..8be21c41807 100644
--- a/configs/qemu-i486/ostest/Make.defs
+++ b/configs/qemu-i486/ostest/Make.defs
@@ -96,6 +96,7 @@ CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(A
 CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS = $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT = .elf
diff --git a/configs/qemu-i486/src/Makefile b/configs/qemu-i486/src/Makefile
index 16ed36505af..8de2ab65963 100644
--- a/configs/qemu-i486/src/Makefile
+++ b/configs/qemu-i486/src/Makefile
@@ -35,48 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)/sched
+ASRCS =
+CSRCS = qemu_boot.c
 
-ASRCS		=
-CSRCS		= qemu_boot.c
-
-AOBJS		= $(ASRCS:.S=$(OBJEXT))
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-  		   -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-else
-  CFLAGS	+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/rgmp/arm/default/Make.defs b/configs/rgmp/arm/default/Make.defs
index 7146a822c63..5899a5aa2cf 100644
--- a/configs/rgmp/arm/default/Make.defs
+++ b/configs/rgmp/arm/default/Make.defs
@@ -73,6 +73,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/arm/nsh/Make.defs b/configs/rgmp/arm/nsh/Make.defs
index 705acc42843..d81c99ac6ca 100644
--- a/configs/rgmp/arm/nsh/Make.defs
+++ b/configs/rgmp/arm/nsh/Make.defs
@@ -73,6 +73,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/x86/cxxtest/Make.defs b/configs/rgmp/x86/cxxtest/Make.defs
index eae3b9dcb65..6d1d6541935 100644
--- a/configs/rgmp/x86/cxxtest/Make.defs
+++ b/configs/rgmp/x86/cxxtest/Make.defs
@@ -84,6 +84,7 @@ CXXFLAGS    = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLA
 CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
 AFLAGS		= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/x86/default/Make.defs b/configs/rgmp/x86/default/Make.defs
index 49fbb454447..8534231a88b 100644
--- a/configs/rgmp/x86/default/Make.defs
+++ b/configs/rgmp/x86/default/Make.defs
@@ -72,6 +72,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/x86/helloxx/Make.defs b/configs/rgmp/x86/helloxx/Make.defs
index a2f4e5c06dd..efd69c5df43 100644
--- a/configs/rgmp/x86/helloxx/Make.defs
+++ b/configs/rgmp/x86/helloxx/Make.defs
@@ -82,6 +82,7 @@ CXXFLAGS    = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLA
 CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
 AFLAGS		= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/x86/nsh/Make.defs b/configs/rgmp/x86/nsh/Make.defs
index d8b373b0a09..5cda75278e6 100644
--- a/configs/rgmp/x86/nsh/Make.defs
+++ b/configs/rgmp/x86/nsh/Make.defs
@@ -72,6 +72,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sam3u-ek/knsh/Make.defs b/configs/sam3u-ek/knsh/Make.defs
index 77b2d816016..239b3962edd 100644
--- a/configs/sam3u-ek/knsh/Make.defs
+++ b/configs/sam3u-ek/knsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam3u-ek/nsh/Make.defs b/configs/sam3u-ek/nsh/Make.defs
index c6f065bd8ab..6c2080d9089 100644
--- a/configs/sam3u-ek/nsh/Make.defs
+++ b/configs/sam3u-ek/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam3u-ek/nx/Make.defs b/configs/sam3u-ek/nx/Make.defs
index 20db6782247..1f21f21a97d 100644
--- a/configs/sam3u-ek/nx/Make.defs
+++ b/configs/sam3u-ek/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam3u-ek/nxwm/Make.defs b/configs/sam3u-ek/nxwm/Make.defs
index 7da2d331d2d..c048060450c 100644
--- a/configs/sam3u-ek/nxwm/Make.defs
+++ b/configs/sam3u-ek/nxwm/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam3u-ek/src/Makefile b/configs/sam3u-ek/src/Makefile
index c062a22cb6e..693f2b790ba 100644
--- a/configs/sam3u-ek/src/Makefile
+++ b/configs/sam3u-ek/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c sam_leds.c sam_buttons.c sam_spi.c sam_usbdev.c
 
 ifeq ($(CONFIG_HAVE_CXXINITIALIZE),y)
@@ -66,45 +62,4 @@ ifeq ($(CONFIG_INPUT_ADS7843E),y)
 CSRCS += sam_touchscreen.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sam4e-ek/nsh/Make.defs b/configs/sam4e-ek/nsh/Make.defs
index e053f01cbb0..900c5583203 100644
--- a/configs/sam4e-ek/nsh/Make.defs
+++ b/configs/sam4e-ek/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4e-ek/nxwm/Make.defs b/configs/sam4e-ek/nxwm/Make.defs
index 63a497eab38..e2402e15805 100644
--- a/configs/sam4e-ek/nxwm/Make.defs
+++ b/configs/sam4e-ek/nxwm/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4e-ek/src/Makefile b/configs/sam4e-ek/src/Makefile
index 8c28707f65c..8fcf1b62dd7 100644
--- a/configs/sam4e-ek/src/Makefile
+++ b/configs/sam4e-ek/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c sam_leds.c sam_buttons.c sam_udp.c
 
 ifeq ($(CONFIG_HAVE_CXXINITIALIZE),y)
@@ -83,45 +79,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += sam_usbmsc.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sam4e-ek/usbnsh/Make.defs b/configs/sam4e-ek/usbnsh/Make.defs
index 9e0ef625bb7..0f4048b4b46 100644
--- a/configs/sam4e-ek/usbnsh/Make.defs
+++ b/configs/sam4e-ek/usbnsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4l-xplained/nsh/Make.defs b/configs/sam4l-xplained/nsh/Make.defs
index 19a2e40bbb2..b7315982fe4 100644
--- a/configs/sam4l-xplained/nsh/Make.defs
+++ b/configs/sam4l-xplained/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4l-xplained/src/Makefile b/configs/sam4l-xplained/src/Makefile
index ff7c9e38dfd..9bd55b458a0 100644
--- a/configs/sam4l-xplained/src/Makefile
+++ b/configs/sam4l-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -84,45 +80,4 @@ endif
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sam4s-xplained-pro/nsh/Make.defs b/configs/sam4s-xplained-pro/nsh/Make.defs
index 38c19fd53c4..6064da7bd16 100644
--- a/configs/sam4s-xplained-pro/nsh/Make.defs
+++ b/configs/sam4s-xplained-pro/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4s-xplained-pro/src/Makefile b/configs/sam4s-xplained-pro/src/Makefile
index e3ebc842f83..225063da12e 100644
--- a/configs/sam4s-xplained-pro/src/Makefile
+++ b/configs/sam4s-xplained-pro/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXXINITIALIZE),y)
@@ -76,45 +72,4 @@ ifeq ($(CONFIG_TIMER),y)
 CSRCS += sam_tc.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sam4s-xplained/nsh/Make.defs b/configs/sam4s-xplained/nsh/Make.defs
index 76b42abcaff..8e67c39cca2 100644
--- a/configs/sam4s-xplained/nsh/Make.defs
+++ b/configs/sam4s-xplained/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4s-xplained/src/Makefile b/configs/sam4s-xplained/src/Makefile
index 0a2ee09550e..82173fa00c8 100644
--- a/configs/sam4s-xplained/src/Makefile
+++ b/configs/sam4s-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_SAM34_EXTSRAM0),y)
@@ -60,45 +56,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += sam_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sama5d3-xplained/bridge/Make.defs b/configs/sama5d3-xplained/bridge/Make.defs
index 0a8ff1f06bc..6c18b0b34cf 100644
--- a/configs/sama5d3-xplained/bridge/Make.defs
+++ b/configs/sama5d3-xplained/bridge/Make.defs
@@ -107,6 +107,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3-xplained/nsh/Make.defs b/configs/sama5d3-xplained/nsh/Make.defs
index b71fba1a551..2aaabd56ce1 100644
--- a/configs/sama5d3-xplained/nsh/Make.defs
+++ b/configs/sama5d3-xplained/nsh/Make.defs
@@ -107,6 +107,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3-xplained/src/Makefile b/configs/sama5d3-xplained/src/Makefile
index ac03e09f654..2c480b7ddfc 100644
--- a/configs/sama5d3-xplained/src/Makefile
+++ b/configs/sama5d3-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -139,45 +135,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += sam_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-a}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-a
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sama5d3x-ek/demo/Make.defs b/configs/sama5d3x-ek/demo/Make.defs
index 62b571695d5..61818f27987 100644
--- a/configs/sama5d3x-ek/demo/Make.defs
+++ b/configs/sama5d3x-ek/demo/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/hello/Make.defs b/configs/sama5d3x-ek/hello/Make.defs
index be854ff5d7c..da951571529 100644
--- a/configs/sama5d3x-ek/hello/Make.defs
+++ b/configs/sama5d3x-ek/hello/Make.defs
@@ -126,6 +126,7 @@ ifeq ($(WINTOOL),y)
 else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/norboot/Make.defs b/configs/sama5d3x-ek/norboot/Make.defs
index bc5860e1973..b6bdfba5085 100644
--- a/configs/sama5d3x-ek/norboot/Make.defs
+++ b/configs/sama5d3x-ek/norboot/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/nsh/Make.defs b/configs/sama5d3x-ek/nsh/Make.defs
index add74fbc4f3..75a5e46a1aa 100644
--- a/configs/sama5d3x-ek/nsh/Make.defs
+++ b/configs/sama5d3x-ek/nsh/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/nx/Make.defs b/configs/sama5d3x-ek/nx/Make.defs
index 43c891990d2..59b51f09c9d 100644
--- a/configs/sama5d3x-ek/nx/Make.defs
+++ b/configs/sama5d3x-ek/nx/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/nxplayer/Make.defs b/configs/sama5d3x-ek/nxplayer/Make.defs
index 710ec4110b3..f3735b2c26b 100644
--- a/configs/sama5d3x-ek/nxplayer/Make.defs
+++ b/configs/sama5d3x-ek/nxplayer/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/nxwm/Make.defs b/configs/sama5d3x-ek/nxwm/Make.defs
index a1bc4f2b1ea..a724bc77404 100644
--- a/configs/sama5d3x-ek/nxwm/Make.defs
+++ b/configs/sama5d3x-ek/nxwm/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/ov2640/Make.defs b/configs/sama5d3x-ek/ov2640/Make.defs
index 7cde1a1bd90..dd416993d6a 100644
--- a/configs/sama5d3x-ek/ov2640/Make.defs
+++ b/configs/sama5d3x-ek/ov2640/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/src/Makefile b/configs/sama5d3x-ek/src/Makefile
index e0e57b279d1..0a045603da8 100644
--- a/configs/sama5d3x-ek/src/Makefile
+++ b/configs/sama5d3x-ek/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -166,45 +162,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += sam_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-a}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-a
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sama5d4-ek/at25boot/Make.defs b/configs/sama5d4-ek/at25boot/Make.defs
index 12309214ccb..4ba8d02e119 100644
--- a/configs/sama5d4-ek/at25boot/Make.defs
+++ b/configs/sama5d4-ek/at25boot/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/bridge/Make.defs b/configs/sama5d4-ek/bridge/Make.defs
index 4cdd8375560..9b687052cd2 100644
--- a/configs/sama5d4-ek/bridge/Make.defs
+++ b/configs/sama5d4-ek/bridge/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/dramboot/Make.defs b/configs/sama5d4-ek/dramboot/Make.defs
index fc9bf8e2fd4..c2e6bf72b52 100644
--- a/configs/sama5d4-ek/dramboot/Make.defs
+++ b/configs/sama5d4-ek/dramboot/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/elf/Make.defs b/configs/sama5d4-ek/elf/Make.defs
index 75a4cccbaf5..b3b4ccb091c 100644
--- a/configs/sama5d4-ek/elf/Make.defs
+++ b/configs/sama5d4-ek/elf/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/ipv6/Make.defs b/configs/sama5d4-ek/ipv6/Make.defs
index 7c28073001c..e21884f83d1 100644
--- a/configs/sama5d4-ek/ipv6/Make.defs
+++ b/configs/sama5d4-ek/ipv6/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/knsh/Make.defs b/configs/sama5d4-ek/knsh/Make.defs
index ffb4374377f..e7e03fcee30 100644
--- a/configs/sama5d4-ek/knsh/Make.defs
+++ b/configs/sama5d4-ek/knsh/Make.defs
@@ -116,6 +116,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/nsh/Make.defs b/configs/sama5d4-ek/nsh/Make.defs
index 40e7306565a..dad4f21061b 100644
--- a/configs/sama5d4-ek/nsh/Make.defs
+++ b/configs/sama5d4-ek/nsh/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/nxwm/Make.defs b/configs/sama5d4-ek/nxwm/Make.defs
index ce456cabdc8..4b6107c00ae 100644
--- a/configs/sama5d4-ek/nxwm/Make.defs
+++ b/configs/sama5d4-ek/nxwm/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/ramtest/Make.defs b/configs/sama5d4-ek/ramtest/Make.defs
index 86d7b0990e4..5b74a651e00 100644
--- a/configs/sama5d4-ek/ramtest/Make.defs
+++ b/configs/sama5d4-ek/ramtest/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/src/Makefile b/configs/sama5d4-ek/src/Makefile
index 169e9593115..5ea0176ff2f 100644
--- a/configs/sama5d4-ek/src/Makefile
+++ b/configs/sama5d4-ek/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -126,7 +122,6 @@ else
 ifeq ($(CONFIG_BOARD_INITIALIZE),y)
 CSRCS += sam_bringup.c
 endif
-
 endif
 
 ifeq ($(CONFIG_ADC),y)
@@ -155,45 +150,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += sam_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-a}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-a
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/samd20-xplained/nsh/Make.defs b/configs/samd20-xplained/nsh/Make.defs
index 1ba03d1c0df..368ca755c18 100644
--- a/configs/samd20-xplained/nsh/Make.defs
+++ b/configs/samd20-xplained/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samd20-xplained/src/Makefile b/configs/samd20-xplained/src/Makefile
index 66aef7fafc7..12bb78dfe35 100644
--- a/configs/samd20-xplained/src/Makefile
+++ b/configs/samd20-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -74,45 +70,4 @@ CSRCS += sam_ug2832hsweg04.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/samd21-xplained/nsh/Make.defs b/configs/samd21-xplained/nsh/Make.defs
index 909b5e30ca5..114e19accac 100644
--- a/configs/samd21-xplained/nsh/Make.defs
+++ b/configs/samd21-xplained/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samd21-xplained/src/Makefile b/configs/samd21-xplained/src/Makefile
index 9f47e329df7..3b5b8533340 100644
--- a/configs/samd21-xplained/src/Makefile
+++ b/configs/samd21-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -74,45 +70,4 @@ CSRCS += sam_ug2832hsweg04.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/saml21-xplained/nsh/Make.defs b/configs/saml21-xplained/nsh/Make.defs
index 82d2c3436a5..71cd584c481 100644
--- a/configs/saml21-xplained/nsh/Make.defs
+++ b/configs/saml21-xplained/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/saml21-xplained/src/Makefile b/configs/saml21-xplained/src/Makefile
index f298bf0683e..6b939b54b08 100644
--- a/configs/saml21-xplained/src/Makefile
+++ b/configs/saml21-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -74,45 +70,4 @@ CSRCS += sam_ug2832hsweg04.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/samv71-xult/mxtxplnd/Make.defs b/configs/samv71-xult/mxtxplnd/Make.defs
index cdcdd307365..0a329227c8b 100644
--- a/configs/samv71-xult/mxtxplnd/Make.defs
+++ b/configs/samv71-xult/mxtxplnd/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samv71-xult/netnsh/Make.defs b/configs/samv71-xult/netnsh/Make.defs
index 9fe0fefb2f0..bd88007ce9c 100644
--- a/configs/samv71-xult/netnsh/Make.defs
+++ b/configs/samv71-xult/netnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samv71-xult/nsh/Make.defs b/configs/samv71-xult/nsh/Make.defs
index 65c221225bd..2acf48fc8c9 100644
--- a/configs/samv71-xult/nsh/Make.defs
+++ b/configs/samv71-xult/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samv71-xult/nxwm/Make.defs b/configs/samv71-xult/nxwm/Make.defs
index ab1f9f06b29..93c86e94509 100644
--- a/configs/samv71-xult/nxwm/Make.defs
+++ b/configs/samv71-xult/nxwm/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samv71-xult/src/Makefile b/configs/samv71-xult/src/Makefile
index 4cba7ecbe8c..17a69202e78 100644
--- a/configs/samv71-xult/src/Makefile
+++ b/configs/samv71-xult/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_SAMV7_SDRAMC),y)
@@ -123,45 +119,4 @@ CSRCS += sam_maxtouch.c sam_atmxtconfig.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/shenzhou/nsh/Make.defs b/configs/shenzhou/nsh/Make.defs
index ad481f81667..3c8bda73855 100644
--- a/configs/shenzhou/nsh/Make.defs
+++ b/configs/shenzhou/nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/shenzhou/nxwm/Make.defs b/configs/shenzhou/nxwm/Make.defs
index 73930b1d61d..f0f3cc6ed09 100644
--- a/configs/shenzhou/nxwm/Make.defs
+++ b/configs/shenzhou/nxwm/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/shenzhou/src/Makefile b/configs/shenzhou/src/Makefile
index 75f839b279a..774768904be 100644
--- a/configs/shenzhou/src/Makefile
+++ b/configs/shenzhou/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c stm32_mmcsd.c stm32_chipid.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -104,43 +100,4 @@ ifeq ($(CONFIG_INPUT_ADS7843E),y)
 CSRCS += stm32_touchscreen.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/shenzhou/thttpd/Make.defs b/configs/shenzhou/thttpd/Make.defs
index 7c9082f1122..db991f1a9f7 100644
--- a/configs/shenzhou/thttpd/Make.defs
+++ b/configs/shenzhou/thttpd/Make.defs
@@ -102,6 +102,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sim/bas/Make.defs b/configs/sim/bas/Make.defs
index b49e86c8e3f..0fa6ccd6189 100644
--- a/configs/sim/bas/Make.defs
+++ b/configs/sim/bas/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/configdata/Make.defs b/configs/sim/configdata/Make.defs
index 2531b31e120..f27349998ab 100644
--- a/configs/sim/configdata/Make.defs
+++ b/configs/sim/configdata/Make.defs
@@ -90,6 +90,7 @@ else
 endif
 
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 
diff --git a/configs/sim/cxxtest/Make.defs b/configs/sim/cxxtest/Make.defs
index 5c9968cabde..65c66b50444 100644
--- a/configs/sim/cxxtest/Make.defs
+++ b/configs/sim/cxxtest/Make.defs
@@ -96,6 +96,7 @@ else
 endif
 
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 
diff --git a/configs/sim/mount/Make.defs b/configs/sim/mount/Make.defs
index 1f0d38b68cd..b0ae2cf1b3d 100644
--- a/configs/sim/mount/Make.defs
+++ b/configs/sim/mount/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/mtdpart/Make.defs b/configs/sim/mtdpart/Make.defs
index 510fa1283ff..b4544b6cc3d 100644
--- a/configs/sim/mtdpart/Make.defs
+++ b/configs/sim/mtdpart/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/mtdrwb/Make.defs b/configs/sim/mtdrwb/Make.defs
index 8165f63ca0e..f05ff270a3f 100644
--- a/configs/sim/mtdrwb/Make.defs
+++ b/configs/sim/mtdrwb/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nettest/Make.defs b/configs/sim/nettest/Make.defs
index 792eae9147f..c836487f25e 100644
--- a/configs/sim/nettest/Make.defs
+++ b/configs/sim/nettest/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nsh/Make.defs b/configs/sim/nsh/Make.defs
index ba2d38290b9..18a33b2a3d9 100644
--- a/configs/sim/nsh/Make.defs
+++ b/configs/sim/nsh/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nsh2/Make.defs b/configs/sim/nsh2/Make.defs
index 9b2625bc1d9..c9103959da1 100644
--- a/configs/sim/nsh2/Make.defs
+++ b/configs/sim/nsh2/Make.defs
@@ -93,6 +93,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nx/Make.defs b/configs/sim/nx/Make.defs
index b1985f83c9d..f8cfed31024 100644
--- a/configs/sim/nx/Make.defs
+++ b/configs/sim/nx/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nx11/Make.defs b/configs/sim/nx11/Make.defs
index 41e3d2bf3a7..64b490bc8df 100644
--- a/configs/sim/nx11/Make.defs
+++ b/configs/sim/nx11/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nxffs/Make.defs b/configs/sim/nxffs/Make.defs
index 8f0c3d62b0d..586fcc9b572 100644
--- a/configs/sim/nxffs/Make.defs
+++ b/configs/sim/nxffs/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nxlines/Make.defs b/configs/sim/nxlines/Make.defs
index 4ccf4977e9f..cadaa123b65 100644
--- a/configs/sim/nxlines/Make.defs
+++ b/configs/sim/nxlines/Make.defs
@@ -90,6 +90,7 @@ else
 endif
 
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 
diff --git a/configs/sim/nxwm/Make.defs b/configs/sim/nxwm/Make.defs
index ef9e0a64938..ab43c4fbebc 100644
--- a/configs/sim/nxwm/Make.defs
+++ b/configs/sim/nxwm/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/ostest/Make.defs b/configs/sim/ostest/Make.defs
index 8b907cf0d8a..80e45f0d310 100644
--- a/configs/sim/ostest/Make.defs
+++ b/configs/sim/ostest/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 
diff --git a/configs/sim/pashello/Make.defs b/configs/sim/pashello/Make.defs
index a35828e9fb3..6c64d092394 100644
--- a/configs/sim/pashello/Make.defs
+++ b/configs/sim/pashello/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/src/Makefile b/configs/sim/src/Makefile
index 5afc39fb30a..23728049e25 100644
--- a/configs/sim/src/Makefile
+++ b/configs/sim/src/Makefile
@@ -35,12 +35,7 @@
 
 include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-CFLAGS += -I$(TOPDIR)/arch/sim/src
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS =
 
 ifeq ($(CONFIG_BOARD_INITIALIZE),y)
@@ -56,37 +51,4 @@ ifeq ($(CONFIG_SIM_TOUCHSCREEN),y)
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(Q) $(AR) $@ # Create an empty archive
-ifneq ($(OBJS),)
-	$(call ARCHIVE, $@, $(OBJS))
-endif
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sim/touchscreen/Make.defs b/configs/sim/touchscreen/Make.defs
index 21b4908baf1..64893164395 100644
--- a/configs/sim/touchscreen/Make.defs
+++ b/configs/sim/touchscreen/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/traveler/Make.defs b/configs/sim/traveler/Make.defs
index f2f76fa72ab..1e3baa41ec8 100644
--- a/configs/sim/traveler/Make.defs
+++ b/configs/sim/traveler/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/udgram/Make.defs b/configs/sim/udgram/Make.defs
index 3627cfa68fc..9e3f8945637 100644
--- a/configs/sim/udgram/Make.defs
+++ b/configs/sim/udgram/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/unionfs/Make.defs b/configs/sim/unionfs/Make.defs
index 63e6a06865c..5cb5254b8ab 100644
--- a/configs/sim/unionfs/Make.defs
+++ b/configs/sim/unionfs/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/ustream/Make.defs b/configs/sim/ustream/Make.defs
index 94c36d7108f..f425884858d 100644
--- a/configs/sim/ustream/Make.defs
+++ b/configs/sim/ustream/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/skp16c26/ostest/Make.defs b/configs/skp16c26/ostest/Make.defs
index af3fb2c9f88..91b1a3b02c5 100644
--- a/configs/skp16c26/ostest/Make.defs
+++ b/configs/skp16c26/ostest/Make.defs
@@ -68,6 +68,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/spark/composite/Make.defs b/configs/spark/composite/Make.defs
index ebb8ce72e50..1ec991cef18 100644
--- a/configs/spark/composite/Make.defs
+++ b/configs/spark/composite/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/spark/nsh/Make.defs b/configs/spark/nsh/Make.defs
index 9aa372a0486..610fe87aa67 100644
--- a/configs/spark/nsh/Make.defs
+++ b/configs/spark/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/spark/src/Makefile b/configs/spark/src/Makefile
index fe6b4dd460f..dcf7a2eb35f 100644
--- a/configs/spark/src/Makefile
+++ b/configs/spark/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -81,43 +77,4 @@ ifeq ($(CONFIG_CC3000_PROBES),)
 CSRCS += stm32_io.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-          -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-          -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/spark/usbmsc/Make.defs b/configs/spark/usbmsc/Make.defs
index 1b08140c55d..fcf9c818927 100644
--- a/configs/spark/usbmsc/Make.defs
+++ b/configs/spark/usbmsc/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/spark/usbnsh/Make.defs b/configs/spark/usbnsh/Make.defs
index ba71fde809d..b9c0e2e75b9 100644
--- a/configs/spark/usbnsh/Make.defs
+++ b/configs/spark/usbnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/spark/usbserial/Make.defs b/configs/spark/usbserial/Make.defs
index bdb03c8131d..da7f56bde0f 100644
--- a/configs/spark/usbserial/Make.defs
+++ b/configs/spark/usbserial/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/buttons/Make.defs b/configs/stm3210e-eval/buttons/Make.defs
index 4e8f3877514..83712d237d2 100644
--- a/configs/stm3210e-eval/buttons/Make.defs
+++ b/configs/stm3210e-eval/buttons/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/composite/Make.defs b/configs/stm3210e-eval/composite/Make.defs
index 40b0e07a04d..25f6d3d95c2 100644
--- a/configs/stm3210e-eval/composite/Make.defs
+++ b/configs/stm3210e-eval/composite/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/nsh/Make.defs b/configs/stm3210e-eval/nsh/Make.defs
index efcd6673965..fd88105b07f 100644
--- a/configs/stm3210e-eval/nsh/Make.defs
+++ b/configs/stm3210e-eval/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/nsh2/Make.defs b/configs/stm3210e-eval/nsh2/Make.defs
index 8eec4a6b501..252b05c929b 100644
--- a/configs/stm3210e-eval/nsh2/Make.defs
+++ b/configs/stm3210e-eval/nsh2/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/nx/Make.defs b/configs/stm3210e-eval/nx/Make.defs
index 132df9e1624..103a6f940fb 100644
--- a/configs/stm3210e-eval/nx/Make.defs
+++ b/configs/stm3210e-eval/nx/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/nxterm/Make.defs b/configs/stm3210e-eval/nxterm/Make.defs
index 73f8098de5c..1793f4b566c 100644
--- a/configs/stm3210e-eval/nxterm/Make.defs
+++ b/configs/stm3210e-eval/nxterm/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/pm/Make.defs b/configs/stm3210e-eval/pm/Make.defs
index c59766b9b3b..b074d42de76 100644
--- a/configs/stm3210e-eval/pm/Make.defs
+++ b/configs/stm3210e-eval/pm/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/src/Makefile b/configs/stm3210e-eval/src/Makefile
index cc5f8c26862..84ecd432911 100644
--- a/configs/stm3210e-eval/src/Makefile
+++ b/configs/stm3210e-eval/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_spi.c stm32_usbdev.c
 
 ifeq ($(CONFIG_STM32_FSMC),y)
@@ -96,43 +92,4 @@ ifeq ($(CONFIG_ARCH_IDLE_CUSTOM),y)
 CSRCS += stm32_idle.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm3210e-eval/usbmsc/Make.defs b/configs/stm3210e-eval/usbmsc/Make.defs
index db17fddec68..7771aba1f72 100644
--- a/configs/stm3210e-eval/usbmsc/Make.defs
+++ b/configs/stm3210e-eval/usbmsc/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/usbserial/Make.defs b/configs/stm3210e-eval/usbserial/Make.defs
index 623792e1c7d..69e37b55e26 100644
--- a/configs/stm3210e-eval/usbserial/Make.defs
+++ b/configs/stm3210e-eval/usbserial/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/dhcpd/Make.defs b/configs/stm3220g-eval/dhcpd/Make.defs
index 9e2a0a321c7..4e136051ce0 100644
--- a/configs/stm3220g-eval/dhcpd/Make.defs
+++ b/configs/stm3220g-eval/dhcpd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/nettest/Make.defs b/configs/stm3220g-eval/nettest/Make.defs
index e0bd16d45f4..a7ca3caa52a 100644
--- a/configs/stm3220g-eval/nettest/Make.defs
+++ b/configs/stm3220g-eval/nettest/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/nsh/Make.defs b/configs/stm3220g-eval/nsh/Make.defs
index 5f7770a56c8..f07a98bf189 100644
--- a/configs/stm3220g-eval/nsh/Make.defs
+++ b/configs/stm3220g-eval/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/nsh2/Make.defs b/configs/stm3220g-eval/nsh2/Make.defs
index dc69c283575..59285405bf9 100644
--- a/configs/stm3220g-eval/nsh2/Make.defs
+++ b/configs/stm3220g-eval/nsh2/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/nxwm/Make.defs b/configs/stm3220g-eval/nxwm/Make.defs
index 16bc580752f..b7b945e1e0e 100644
--- a/configs/stm3220g-eval/nxwm/Make.defs
+++ b/configs/stm3220g-eval/nxwm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/src/Makefile b/configs/stm3220g-eval/src/Makefile
index 972e5d8a131..7f70c56c5fe 100644
--- a/configs/stm3220g-eval/src/Makefile
+++ b/configs/stm3220g-eval/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -88,43 +84,4 @@ ifeq ($(CONFIG_INPUT_STMPE811),y)
 CSRCS += stm32_stmpe811.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm3220g-eval/telnetd/Make.defs b/configs/stm3220g-eval/telnetd/Make.defs
index 7eb4a42b89f..8134a942c94 100644
--- a/configs/stm3220g-eval/telnetd/Make.defs
+++ b/configs/stm3220g-eval/telnetd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/dhcpd/Make.defs b/configs/stm3240g-eval/dhcpd/Make.defs
index 10666d67ac3..8baed8c190c 100644
--- a/configs/stm3240g-eval/dhcpd/Make.defs
+++ b/configs/stm3240g-eval/dhcpd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/discover/Make.defs b/configs/stm3240g-eval/discover/Make.defs
index 0290973fee4..df22d647eb9 100644
--- a/configs/stm3240g-eval/discover/Make.defs
+++ b/configs/stm3240g-eval/discover/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/knxwm/Make.defs b/configs/stm3240g-eval/knxwm/Make.defs
index c82c104c3e6..d6adeaac320 100644
--- a/configs/stm3240g-eval/knxwm/Make.defs
+++ b/configs/stm3240g-eval/knxwm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nettest/Make.defs b/configs/stm3240g-eval/nettest/Make.defs
index 5e2e4989a0f..c6ddb070d68 100644
--- a/configs/stm3240g-eval/nettest/Make.defs
+++ b/configs/stm3240g-eval/nettest/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nsh/Make.defs b/configs/stm3240g-eval/nsh/Make.defs
index 9c0d1f22cc4..ec79540a39b 100644
--- a/configs/stm3240g-eval/nsh/Make.defs
+++ b/configs/stm3240g-eval/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nsh2/Make.defs b/configs/stm3240g-eval/nsh2/Make.defs
index ff9c431c47f..b53a86b30c0 100644
--- a/configs/stm3240g-eval/nsh2/Make.defs
+++ b/configs/stm3240g-eval/nsh2/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nxterm/Make.defs b/configs/stm3240g-eval/nxterm/Make.defs
index 008f8f4935c..752c82473a8 100644
--- a/configs/stm3240g-eval/nxterm/Make.defs
+++ b/configs/stm3240g-eval/nxterm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nxwm/Make.defs b/configs/stm3240g-eval/nxwm/Make.defs
index 14417676de6..57b74356d88 100644
--- a/configs/stm3240g-eval/nxwm/Make.defs
+++ b/configs/stm3240g-eval/nxwm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/src/Makefile b/configs/stm3240g-eval/src/Makefile
index 47694793b7c..bc656936bf3 100644
--- a/configs/stm3240g-eval/src/Makefile
+++ b/configs/stm3240g-eval/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -93,43 +89,4 @@ ifeq ($(CONFIG_QENCODER),y)
 CSRCS += stm32_qencoder.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm3240g-eval/telnetd/Make.defs b/configs/stm3240g-eval/telnetd/Make.defs
index 4d5fbc140cf..9957810fcf9 100644
--- a/configs/stm3240g-eval/telnetd/Make.defs
+++ b/configs/stm3240g-eval/telnetd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/webserver/Make.defs b/configs/stm3240g-eval/webserver/Make.defs
index f2799bafecb..cd6ecd5385b 100644
--- a/configs/stm3240g-eval/webserver/Make.defs
+++ b/configs/stm3240g-eval/webserver/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/xmlrpc/Make.defs b/configs/stm3240g-eval/xmlrpc/Make.defs
index cedbbf27928..1883fe20df3 100644
--- a/configs/stm3240g-eval/xmlrpc/Make.defs
+++ b/configs/stm3240g-eval/xmlrpc/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32_tiny/nsh/Make.defs b/configs/stm32_tiny/nsh/Make.defs
index 92c5b7b7d96..a76544a8d7c 100644
--- a/configs/stm32_tiny/nsh/Make.defs
+++ b/configs/stm32_tiny/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32_tiny/src/Makefile b/configs/stm32_tiny/src/Makefile
index 6fb6bcc26e4..64fec8342bb 100644
--- a/configs/stm32_tiny/src/Makefile
+++ b/configs/stm32_tiny/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_spi.c stm32_usbdev.c
 
 ifeq ($(CONFIG_PWM),y)
@@ -59,43 +55,4 @@ ifeq ($(CONFIG_WATCHDOG),y)
 CSRCS += stm32_watchdog.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32_tiny/usbnsh/Make.defs b/configs/stm32_tiny/usbnsh/Make.defs
index b7bf76cef60..5a4754d5306 100644
--- a/configs/stm32_tiny/usbnsh/Make.defs
+++ b/configs/stm32_tiny/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f3discovery/nsh/Make.defs b/configs/stm32f3discovery/nsh/Make.defs
index 620e499386f..9e207453fc1 100644
--- a/configs/stm32f3discovery/nsh/Make.defs
+++ b/configs/stm32f3discovery/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f3discovery/src/Makefile b/configs/stm32f3discovery/src/Makefile
index f9069ec67f8..5a4e5bd98e4 100644
--- a/configs/stm32f3discovery/src/Makefile
+++ b/configs/stm32f3discovery/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -76,47 +72,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += stm32_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32f3discovery/usbnsh/Make.defs b/configs/stm32f3discovery/usbnsh/Make.defs
index 71e07fc60be..30ba9032a90 100644
--- a/configs/stm32f3discovery/usbnsh/Make.defs
+++ b/configs/stm32f3discovery/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/extflash/Make.defs b/configs/stm32f429i-disco/extflash/Make.defs
index e66058c1947..e7c562b7af4 100644
--- a/configs/stm32f429i-disco/extflash/Make.defs
+++ b/configs/stm32f429i-disco/extflash/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/lcd/Make.defs b/configs/stm32f429i-disco/lcd/Make.defs
index 37dfc4345ab..507caea08a2 100644
--- a/configs/stm32f429i-disco/lcd/Make.defs
+++ b/configs/stm32f429i-disco/lcd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/ltdc/Make.defs b/configs/stm32f429i-disco/ltdc/Make.defs
index 0b140133fea..362ef36db03 100644
--- a/configs/stm32f429i-disco/ltdc/Make.defs
+++ b/configs/stm32f429i-disco/ltdc/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/nsh/Make.defs b/configs/stm32f429i-disco/nsh/Make.defs
index 4edf1ac1c24..11016f72057 100644
--- a/configs/stm32f429i-disco/nsh/Make.defs
+++ b/configs/stm32f429i-disco/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/src/Makefile b/configs/stm32f429i-disco/src/Makefile
index 93ba4835bde..a6ee8944380 100644
--- a/configs/stm32f429i-disco/src/Makefile
+++ b/configs/stm32f429i-disco/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -87,47 +83,4 @@ ifeq ($(CONFIG_ARCH_FPU),y)
 CSRCS += stm32_ostest.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32f429i-disco/usbmsc/Make.defs b/configs/stm32f429i-disco/usbmsc/Make.defs
index e66058c1947..e7c562b7af4 100644
--- a/configs/stm32f429i-disco/usbmsc/Make.defs
+++ b/configs/stm32f429i-disco/usbmsc/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/usbnsh/Make.defs b/configs/stm32f429i-disco/usbnsh/Make.defs
index e66058c1947..e7c562b7af4 100644
--- a/configs/stm32f429i-disco/usbnsh/Make.defs
+++ b/configs/stm32f429i-disco/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/cxxtest/Make.defs b/configs/stm32f4discovery/cxxtest/Make.defs
index c0d12169bd1..190d44ae44c 100644
--- a/configs/stm32f4discovery/cxxtest/Make.defs
+++ b/configs/stm32f4discovery/cxxtest/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/elf/Make.defs b/configs/stm32f4discovery/elf/Make.defs
index 710ca8ba6bf..32a42399262 100644
--- a/configs/stm32f4discovery/elf/Make.defs
+++ b/configs/stm32f4discovery/elf/Make.defs
@@ -109,6 +109,7 @@ endif
 
 # File extensions
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/ipv6/Make.defs b/configs/stm32f4discovery/ipv6/Make.defs
index 12afb4e400a..4110b5af756 100644
--- a/configs/stm32f4discovery/ipv6/Make.defs
+++ b/configs/stm32f4discovery/ipv6/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/kostest/Make.defs b/configs/stm32f4discovery/kostest/Make.defs
index 283e20a3be4..4cf8cea33ee 100644
--- a/configs/stm32f4discovery/kostest/Make.defs
+++ b/configs/stm32f4discovery/kostest/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/netnsh/Make.defs b/configs/stm32f4discovery/netnsh/Make.defs
index 06f6462a0a8..29c4533db01 100644
--- a/configs/stm32f4discovery/netnsh/Make.defs
+++ b/configs/stm32f4discovery/netnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/nsh/Make.defs b/configs/stm32f4discovery/nsh/Make.defs
index 46965718901..dd2c9792107 100644
--- a/configs/stm32f4discovery/nsh/Make.defs
+++ b/configs/stm32f4discovery/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/nxlines/Make.defs b/configs/stm32f4discovery/nxlines/Make.defs
index c9097a420ef..1d77f51f0dc 100644
--- a/configs/stm32f4discovery/nxlines/Make.defs
+++ b/configs/stm32f4discovery/nxlines/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/pm/Make.defs b/configs/stm32f4discovery/pm/Make.defs
index 07f7d01f881..ccb4d3c3fc5 100644
--- a/configs/stm32f4discovery/pm/Make.defs
+++ b/configs/stm32f4discovery/pm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/posix_spawn/Make.defs b/configs/stm32f4discovery/posix_spawn/Make.defs
index 7b40351a130..6e22c954816 100644
--- a/configs/stm32f4discovery/posix_spawn/Make.defs
+++ b/configs/stm32f4discovery/posix_spawn/Make.defs
@@ -109,6 +109,7 @@ endif
 
 # File extensions
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/src/Makefile b/configs/stm32f4discovery/src/Makefile
index 2adf164f4b3..92e97ae433c 100644
--- a/configs/stm32f4discovery/src/Makefile
+++ b/configs/stm32f4discovery/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_bringup.c stm32_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -108,47 +104,4 @@ ifeq ($(CONFIG_LCD_UG2864HSWEG01),y)
 CSRCS += stm32_ug2864hsweg01.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32f4discovery/usbnsh/Make.defs b/configs/stm32f4discovery/usbnsh/Make.defs
index 4a5dc6e0824..421ee632165 100644
--- a/configs/stm32f4discovery/usbnsh/Make.defs
+++ b/configs/stm32f4discovery/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/winbuild/Make.defs b/configs/stm32f4discovery/winbuild/Make.defs
index ea4fc050d35..cfc4261cbf5 100644
--- a/configs/stm32f4discovery/winbuild/Make.defs
+++ b/configs/stm32f4discovery/winbuild/Make.defs
@@ -81,6 +81,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)\binfmt\libnxflat\gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f746g-disco/knsh/Make.defs b/configs/stm32f746g-disco/knsh/Make.defs
index 4afdad55c35..d4200d1c24c 100644
--- a/configs/stm32f746g-disco/knsh/Make.defs
+++ b/configs/stm32f746g-disco/knsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f746g-disco/netnsh/Make.defs b/configs/stm32f746g-disco/netnsh/Make.defs
index b62bdfaebde..7ee007aafa4 100644
--- a/configs/stm32f746g-disco/netnsh/Make.defs
+++ b/configs/stm32f746g-disco/netnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f746g-disco/nsh/Make.defs b/configs/stm32f746g-disco/nsh/Make.defs
index 03492adde71..a010feb09fb 100644
--- a/configs/stm32f746g-disco/nsh/Make.defs
+++ b/configs/stm32f746g-disco/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f746g-disco/src/Makefile b/configs/stm32f746g-disco/src/Makefile
index b8c7c79e322..39e6a7f178f 100644
--- a/configs/stm32f746g-disco/src/Makefile
+++ b/configs/stm32f746g-disco/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -64,47 +60,4 @@ ifeq ($(CONFIG_SPORADIC_INSTRUMENTATION),y)
 CSRCS += stm32_sporadic.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32ldiscovery/nsh/Make.defs b/configs/stm32ldiscovery/nsh/Make.defs
index 9c10653acf4..8efa03ac4e8 100644
--- a/configs/stm32ldiscovery/nsh/Make.defs
+++ b/configs/stm32ldiscovery/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32ldiscovery/src/Makefile b/configs/stm32ldiscovery/src/Makefile
index 483ad79f26e..737135dab8e 100644
--- a/configs/stm32ldiscovery/src/Makefile
+++ b/configs/stm32ldiscovery/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -76,47 +72,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += stm32_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32vldiscovery/nsh/Make.defs b/configs/stm32vldiscovery/nsh/Make.defs
index 573ea44afe5..2ba3420459d 100644
--- a/configs/stm32vldiscovery/nsh/Make.defs
+++ b/configs/stm32vldiscovery/nsh/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32vldiscovery/src/Makefile b/configs/stm32vldiscovery/src/Makefile
index a9cbd3cf3f1..c8ef054cf95 100644
--- a/configs/stm32vldiscovery/src/Makefile
+++ b/configs/stm32vldiscovery/src/Makefile
@@ -37,46 +37,6 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_buttons.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sure-pic32mx/nsh/Make.defs b/configs/sure-pic32mx/nsh/Make.defs
index c276cd49416..ef3ef62026b 100644
--- a/configs/sure-pic32mx/nsh/Make.defs
+++ b/configs/sure-pic32mx/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sure-pic32mx/src/Makefile b/configs/sure-pic32mx/src/Makefile
index 1a26a83ee25..c5d918c3886 100644
--- a/configs/sure-pic32mx/src/Makefile
+++ b/configs/sure-pic32mx/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32mx_boot.c pic32mx_spi.c
 
@@ -68,44 +66,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += pic32mx_nsh.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sure-pic32mx/usbnsh/Make.defs b/configs/sure-pic32mx/usbnsh/Make.defs
index 92b55838492..91e97da5157 100644
--- a/configs/sure-pic32mx/usbnsh/Make.defs
+++ b/configs/sure-pic32mx/usbnsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-2.0/hello/Make.defs b/configs/teensy-2.0/hello/Make.defs
index 0d9b4f921d5..f5f10cdba57 100644
--- a/configs/teensy-2.0/hello/Make.defs
+++ b/configs/teensy-2.0/hello/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-2.0/nsh/Make.defs b/configs/teensy-2.0/nsh/Make.defs
index b6e6082cb83..03a23cd836e 100644
--- a/configs/teensy-2.0/nsh/Make.defs
+++ b/configs/teensy-2.0/nsh/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-2.0/src/Makefile b/configs/teensy-2.0/src/Makefile
index b623980fd43..48e413ceda3 100644
--- a/configs/teensy-2.0/src/Makefile
+++ b/configs/teensy-2.0/src/Makefile
@@ -48,55 +48,4 @@ ifeq ($(CONFIG_AVR_SPI),y)
 CSRCS += at90usb_spi.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_ARCH_FAMILY_AVR32),y)
-ARCH_SUBDIR = avr32
-endif
-ifeq ($(CONFIG_ARCH_FAMILY_AVR),y)
-ARCH_SUBDIR = avr
-endif
-
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}"
-else
-  CFLAGS += -I "$(TOPDIR)/sched"
-  CFLAGS += -I "$(ARCH_SRCDIR)/chip"
-  CFLAGS += -I "$(ARCH_SRCDIR)/common"
-  CFLAGS += -I "$(ARCH_SRCDIR)/$(ARCH_SUBDIR)"
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/teensy-2.0/usbmsc/Make.defs b/configs/teensy-2.0/usbmsc/Make.defs
index fb56076097a..84ed1bb223a 100644
--- a/configs/teensy-2.0/usbmsc/Make.defs
+++ b/configs/teensy-2.0/usbmsc/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-3.x/nsh/Make.defs b/configs/teensy-3.x/nsh/Make.defs
index b3ba02965b0..194b383ea80 100644
--- a/configs/teensy-3.x/nsh/Make.defs
+++ b/configs/teensy-3.x/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-3.x/src/Makefile b/configs/teensy-3.x/src/Makefile
index 4c7cee11ac1..33232755f8a 100644
--- a/configs/teensy-3.x/src/Makefile
+++ b/configs/teensy-3.x/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = k20_boot.c k20_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -52,42 +48,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += k20_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-      -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-      -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/teensy-lc/nsh/Make.defs b/configs/teensy-lc/nsh/Make.defs
index e63183f28ee..834b319fce0 100644
--- a/configs/teensy-lc/nsh/Make.defs
+++ b/configs/teensy-lc/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-lc/src/Makefile b/configs/teensy-lc/src/Makefile
index df1d2fa9c87..e48b316136a 100644
--- a/configs/teensy-lc/src/Makefile
+++ b/configs/teensy-lc/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = kl_boardinitialize.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -66,47 +62,4 @@ ifeq ($(CONFIG_PWM),y)
 CSRCS += kl_pwm.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/tm4c123g-launchpad/nsh/Make.defs b/configs/tm4c123g-launchpad/nsh/Make.defs
index 1320fb1bf0c..7213f12548b 100644
--- a/configs/tm4c123g-launchpad/nsh/Make.defs
+++ b/configs/tm4c123g-launchpad/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/tm4c123g-launchpad/src/Makefile b/configs/tm4c123g-launchpad/src/Makefile
index 55043fae966..a3bc4f9acfa 100644
--- a/configs/tm4c123g-launchpad/src/Makefile
+++ b/configs/tm4c123g-launchpad/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = tm4c_boot.c tm4c_bringup.c tm4c_ssi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -67,43 +64,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += tm4c_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/tm4c1294-launchpad/ipv6/Make.defs b/configs/tm4c1294-launchpad/ipv6/Make.defs
index 83a2a6cda15..5be1a4b852d 100644
--- a/configs/tm4c1294-launchpad/ipv6/Make.defs
+++ b/configs/tm4c1294-launchpad/ipv6/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/tm4c1294-launchpad/nsh/Make.defs b/configs/tm4c1294-launchpad/nsh/Make.defs
index 3fdb4b9581f..82211fa6e71 100644
--- a/configs/tm4c1294-launchpad/nsh/Make.defs
+++ b/configs/tm4c1294-launchpad/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/tm4c1294-launchpad/src/Makefile b/configs/tm4c1294-launchpad/src/Makefile
index 4895ec2161a..aeb66d3ae52 100644
--- a/configs/tm4c1294-launchpad/src/Makefile
+++ b/configs/tm4c1294-launchpad/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = tm4c_boot.c tm4c_bringup.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -63,43 +60,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += tm4c_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/twr-k60n512/nsh/Make.defs b/configs/twr-k60n512/nsh/Make.defs
index b7a066fb4f5..6d5380358a2 100644
--- a/configs/twr-k60n512/nsh/Make.defs
+++ b/configs/twr-k60n512/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/twr-k60n512/src/Makefile b/configs/twr-k60n512/src/Makefile
index c94e462444b..026834b66a9 100644
--- a/configs/twr-k60n512/src/Makefile
+++ b/configs/twr-k60n512/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = k60_boot.c k60_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -62,43 +58,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += k60_usbmsc.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ubw32/nsh/Make.defs b/configs/ubw32/nsh/Make.defs
index 21ea6bfa487..704db6e0910 100644
--- a/configs/ubw32/nsh/Make.defs
+++ b/configs/ubw32/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ubw32/src/Makefile b/configs/ubw32/src/Makefile
index 80ee9a09ac3..b3cd1971b15 100644
--- a/configs/ubw32/src/Makefile
+++ b/configs/ubw32/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32_boot.c pic32_leds.c
 
@@ -55,44 +53,4 @@ CSRCS += pic32_usbterm.c
 endif
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/us7032evb1/nsh/Make.defs b/configs/us7032evb1/nsh/Make.defs
index 29b85b7057e..60f929362f4 100644
--- a/configs/us7032evb1/nsh/Make.defs
+++ b/configs/us7032evb1/nsh/Make.defs
@@ -65,6 +65,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/us7032evb1/ostest/Make.defs b/configs/us7032evb1/ostest/Make.defs
index a7139db5d6a..2b17ba9a4e7 100644
--- a/configs/us7032evb1/ostest/Make.defs
+++ b/configs/us7032evb1/ostest/Make.defs
@@ -65,6 +65,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/viewtool-stm32f107/highpri/Make.defs b/configs/viewtool-stm32f107/highpri/Make.defs
index 7fdbc3d17d2..a2666368f33 100644
--- a/configs/viewtool-stm32f107/highpri/Make.defs
+++ b/configs/viewtool-stm32f107/highpri/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/viewtool-stm32f107/netnsh/Make.defs b/configs/viewtool-stm32f107/netnsh/Make.defs
index 76b1ba8f288..fd98f053856 100644
--- a/configs/viewtool-stm32f107/netnsh/Make.defs
+++ b/configs/viewtool-stm32f107/netnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/viewtool-stm32f107/nsh/Make.defs b/configs/viewtool-stm32f107/nsh/Make.defs
index 950642a5568..8dc35062985 100644
--- a/configs/viewtool-stm32f107/nsh/Make.defs
+++ b/configs/viewtool-stm32f107/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/viewtool-stm32f107/src/Makefile b/configs/viewtool-stm32f107/src/Makefile
index b46404cf095..b544590154c 100644
--- a/configs/viewtool-stm32f107/src/Makefile
+++ b/configs/viewtool-stm32f107/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -90,43 +86,4 @@ ifeq ($(CONFIG_VIEWTOOL_HIGHPRI),y)
 CSRCS += stm32_highpri.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-    -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-    -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/vsn/nsh/Make.defs b/configs/vsn/nsh/Make.defs
index 851c6e7d5b0..9f64c271467 100644
--- a/configs/vsn/nsh/Make.defs
+++ b/configs/vsn/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/xtrs/src/Makefile b/configs/xtrs/src/Makefile
index 88062864b74..4398bf214a7 100644
--- a/configs/xtrs/src/Makefile
+++ b/configs/xtrs/src/Makefile
@@ -35,42 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)$(DELIM)sched -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)common -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)z80
+ASRCS =
+CSRCS = xtr_irq.c xtr_serial.c xtr_timerisr.c xtr_lowputc.c
 
-ASRCS		=
-AOBJS		= $(ASRCS:$(ASMEXT)=$(OBJEXT))
-CSRCS		= xtr_irq.c xtr_serial.c xtr_timerisr.c xtr_lowputc.c
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-CFLAGS		+= -I $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-CFLAGS		+= -I $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)include
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/z16f2800100zcog/src/Makefile b/configs/z16f2800100zcog/src/Makefile
index 604269c7221..db25fa8f4a1 100644
--- a/configs/z16f2800100zcog/src/Makefile
+++ b/configs/z16f2800100zcog/src/Makefile
@@ -35,56 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = z16f_lowinit.c z16f_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) $< -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/z80sim/src/Makefile b/configs/z80sim/src/Makefile
index e35674fc46a..0410aedf320 100644
--- a/configs/z80sim/src/Makefile
+++ b/configs/z80sim/src/Makefile
@@ -35,43 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)$(DELIM)sched
-CFLAGS		+= -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)common
-CFLAGS		+= -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)z80
+ASRCS =
+CSRCS = z80_irq.c z80_serial.c z80_timerisr.c z80_lowputc.c
 
-ASRCS		=
-AOBJS		= $(ASRCS:$(ASMEXT)=$(OBJEXT))
-CSRCS		= z80_irq.c z80_serial.c z80_timerisr.c z80_lowputc.c
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-CFLAGS		+= -I $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/z8encore000zco/src/Makefile b/configs/z8encore000zco/src/Makefile
index 76de8d4ae50..7696ccc280c 100644
--- a/configs/z8encore000zco/src/Makefile
+++ b/configs/z8encore000zco/src/Makefile
@@ -35,56 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = z8_lowinit.c z8_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) `cygpath -w $<` -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/z8f64200100kit/src/Makefile b/configs/z8f64200100kit/src/Makefile
index 22e06fb5b1a..9aa595da231 100644
--- a/configs/z8f64200100kit/src/Makefile
+++ b/configs/z8f64200100kit/src/Makefile
@@ -35,56 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = z8_lowinit.c z8_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) `cygpath -w $<` -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/zkit-arm-1769/hello/Make.defs b/configs/zkit-arm-1769/hello/Make.defs
index 4658f51c135..e62ea7e9fe4 100644
--- a/configs/zkit-arm-1769/hello/Make.defs
+++ b/configs/zkit-arm-1769/hello/Make.defs
@@ -101,6 +101,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zkit-arm-1769/nsh/Make.defs b/configs/zkit-arm-1769/nsh/Make.defs
index 58142c8e11d..62f4294caac 100644
--- a/configs/zkit-arm-1769/nsh/Make.defs
+++ b/configs/zkit-arm-1769/nsh/Make.defs
@@ -101,6 +101,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zkit-arm-1769/nxhello/Make.defs b/configs/zkit-arm-1769/nxhello/Make.defs
index 7fc77d1993d..b7a5731c8b7 100644
--- a/configs/zkit-arm-1769/nxhello/Make.defs
+++ b/configs/zkit-arm-1769/nxhello/Make.defs
@@ -101,6 +101,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zkit-arm-1769/src/Makefile b/configs/zkit-arm-1769/src/Makefile
index 15a56ec92b4..3477cac14c7 100644
--- a/configs/zkit-arm-1769/src/Makefile
+++ b/configs/zkit-arm-1769/src/Makefile
@@ -67,48 +67,4 @@ ifeq ($(CONFIG_LPC17_SPI),y)
 CSRCS += lpc17_spi.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(TOPDIR)/sched
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/zkit-arm-1769/thttpd/Make.defs b/configs/zkit-arm-1769/thttpd/Make.defs
index 3ad564cf896..5875f5fb4f0 100644
--- a/configs/zkit-arm-1769/thttpd/Make.defs
+++ b/configs/zkit-arm-1769/thttpd/Make.defs
@@ -101,6 +101,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zp214xpa/nsh/Make.defs b/configs/zp214xpa/nsh/Make.defs
index dcb87ced582..6e775fedacc 100644
--- a/configs/zp214xpa/nsh/Make.defs
+++ b/configs/zp214xpa/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zp214xpa/nxlines/Make.defs b/configs/zp214xpa/nxlines/Make.defs
index 8a29ceaf287..918c9c18b8c 100644
--- a/configs/zp214xpa/nxlines/Make.defs
+++ b/configs/zp214xpa/nxlines/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zp214xpa/src/Makefile b/configs/zp214xpa/src/Makefile
index 6884c9335e9..78bf980efea 100644
--- a/configs/zp214xpa/src/Makefile
+++ b/configs/zp214xpa/src/Makefile
@@ -35,18 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/sched}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm -I$(TOPDIR)/sched
-endif
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS =
 
 ifeq ($(CONFIG_LCD_UG2864AMBAG01),y)
@@ -57,36 +46,4 @@ ifeq ($(CONFIG_LIB_BOARDCTL),y)
 CSRCS += lpc2148_appinit.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-CFLAGS += -I $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk