diff --git a/boards/avr/atmega/arduino-mega2560/src/Makefile b/boards/avr/atmega/arduino-mega2560/src/Makefile
index 87789efe486..8fc112e9720 100644
--- a/boards/avr/atmega/arduino-mega2560/src/Makefile
+++ b/boards/avr/atmega/arduino-mega2560/src/Makefile
@@ -35,57 +35,10 @@
 
 include $(TOPDIR)/Make.defs
 
-CSRCS		= avr_boot.c
+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 ($(CONFIG_ARCH_AVR32),y)
-ARCH_SUBDIR	= avr32
-endif
-ifeq ($(CONFIG_ARCH_AVR),y)
-ARCH_SUBDIR	= avr
-endif
-
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)sched}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)chip}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)common}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)$(ARCH_SUBDIR)}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)atmega2560}
-
-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
-
-context:
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/boards/Board.mk
diff --git a/boards/renesas/m16c/skp16c26/src/Makefile b/boards/renesas/m16c/skp16c26/src/Makefile
index 12a6b9e9b08..bd4493db50a 100644
--- a/boards/renesas/m16c/skp16c26/src/Makefile
+++ b/boards/renesas/m16c/skp16c26/src/Makefile
@@ -35,44 +35,6 @@
 
 include $(TOPDIR)/Make.defs
 
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)sched}
-
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = m16c_leds.c m16c_buttons.c m16c_lcd.c m16c_lcdconsole.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)chip}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)common}
-
-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
-
-context:
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/boards/Board.mk
diff --git a/boards/renesas/rx65n/rx65n-grrose/src/Makefile b/boards/renesas/rx65n/rx65n-grrose/src/Makefile
index 6e0e4933dff..35aebecfba4 100644
--- a/boards/renesas/rx65n/rx65n-grrose/src/Makefile
+++ b/boards/renesas/rx65n/rx65n-grrose/src/Makefile
@@ -20,47 +20,6 @@
 
 include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)chip}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)common}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)sched}
-
-AOBJS = $(ASRCS:.asm=$(OBJEXT))
 CSRCS = rx65n_appinit.c rx65n_bringup.c rx65n_sbram.c rx65n_gpio.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(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)
-	$(call DELFILE, .depend)
-
-ifneq ($(BOARD_CONTEXT),y)
-context:
-endif
-
--include Make.dep
+include $(TOPDIR)/boards/Board.mk
diff --git a/boards/renesas/rx65n/rx65n-rsk1mb/src/Makefile b/boards/renesas/rx65n/rx65n-rsk1mb/src/Makefile
index f1516de8821..fde41a58341 100644
--- a/boards/renesas/rx65n/rx65n-rsk1mb/src/Makefile
+++ b/boards/renesas/rx65n/rx65n-rsk1mb/src/Makefile
@@ -35,47 +35,6 @@
 
 include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)chip}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)common}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)sched}
-
-AOBJS = $(ASRCS:.asm=$(OBJEXT))
 CSRCS =  rx65n_main.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(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)
-	$(call DELFILE, .depend)
-
-ifneq ($(BOARD_CONTEXT),y)
-context:
-endif
-
--include Make.dep
+include $(TOPDIR)/boards/Board.mk
diff --git a/boards/renesas/rx65n/rx65n-rsk2mb/src/Makefile b/boards/renesas/rx65n/rx65n-rsk2mb/src/Makefile
index b67d186ba75..5ef14684081 100644
--- a/boards/renesas/rx65n/rx65n-rsk2mb/src/Makefile
+++ b/boards/renesas/rx65n/rx65n-rsk2mb/src/Makefile
@@ -20,47 +20,6 @@
 
 include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)chip}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)common}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)sched}
-
-AOBJS = $(ASRCS:.asm=$(OBJEXT))
 CSRCS = rx65n_appinit.c rx65n_bringup.c rx65n_sbram.c rx65n_gpio.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(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)
-	$(call DELFILE, .depend)
-
-ifneq ($(BOARD_CONTEXT),y)
-context:
-endif
-
--include Make.dep
+include $(TOPDIR)/boards/Board.mk
diff --git a/boards/renesas/rx65n/rx65n/src/Makefile b/boards/renesas/rx65n/rx65n/src/Makefile
index 45928ee7bcc..9729aa5f383 100644
--- a/boards/renesas/rx65n/rx65n/src/Makefile
+++ b/boards/renesas/rx65n/rx65n/src/Makefile
@@ -35,47 +35,6 @@
 
 include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)chip}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)common}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)sched}
-
-AOBJS = $(ASRCS:.asm=$(OBJEXT))
 CSRCS = rx65n_main.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(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)
-	$(call DELFILE, .depend)
-
-ifneq ($(BOARD_CONTEXT),y)
-context:
-endif
-
--include Make.dep
+include $(TOPDIR)/boards/Board.mk
diff --git a/boards/renesas/sh1/us7032evb1/src/Makefile b/boards/renesas/sh1/us7032evb1/src/Makefile
index b76fe5dcf65..5db1a712c2e 100644
--- a/boards/renesas/sh1/us7032evb1/src/Makefile
+++ b/boards/renesas/sh1/us7032evb1/src/Makefile
@@ -35,43 +35,6 @@
 
 include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)chip}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)common}
-CFLAGS += ${shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)sched}
-
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = sh1_leds.c
-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)
-	$(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)/boards/Board.mk