diff --git a/configs/amber/hello/Make.defs b/configs/amber/hello/Make.defs
index 1c2d8b89e10..15c31f1923a 100644
--- a/configs/amber/hello/Make.defs
+++ b/configs/amber/hello/Make.defs
@@ -88,7 +88,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/avr32dev1/nsh/Make.defs b/configs/avr32dev1/nsh/Make.defs
index 46fef6ec1ed..aa84884d065 100644
--- a/configs/avr32dev1/nsh/Make.defs
+++ b/configs/avr32dev1/nsh/Make.defs
@@ -78,7 +78,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = -Os -ffunction-sections -fdata-sections -fno-strict-aliasing
@@ -110,7 +110,6 @@ ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS += -g
 endif
 
-
 HOSTCC = gcc
 HOSTINCLUDES = -I.
 HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
diff --git a/configs/avr32dev1/ostest/Make.defs b/configs/avr32dev1/ostest/Make.defs
index ad74d889ccc..ab8c9cd36c8 100644
--- a/configs/avr32dev1/ostest/Make.defs
+++ b/configs/avr32dev1/ostest/Make.defs
@@ -78,7 +78,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = -Os -ffunction-sections -fdata-sections -fno-strict-aliasing
@@ -110,7 +110,6 @@ ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS += -g
 endif
 
-
 HOSTCC = gcc
 HOSTINCLUDES = -I.
 HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
diff --git a/configs/c5471evm/httpd/Make.defs b/configs/c5471evm/httpd/Make.defs
index 4d94d83427d..45a567ec435 100644
--- a/configs/c5471evm/httpd/Make.defs
+++ b/configs/c5471evm/httpd/Make.defs
@@ -48,7 +48,7 @@ OBJDUMP			= $(CROSSDEV)objdump
 ARCHCCVERSION		= ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR		= ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -82,11 +82,10 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
-
 MKDEP			= $(TOPDIR)/tools/mkdeps.sh
 
 HOSTCC			= gcc
diff --git a/configs/c5471evm/nettest/Make.defs b/configs/c5471evm/nettest/Make.defs
index 1f8b7afa17c..0db0a8dc9cf 100644
--- a/configs/c5471evm/nettest/Make.defs
+++ b/configs/c5471evm/nettest/Make.defs
@@ -48,7 +48,7 @@ OBJDUMP			= $(CROSSDEV)objdump
 ARCHCCVERSION		= ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR		= ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -82,11 +82,10 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
-
 MKDEP			= $(TOPDIR)/tools/mkdeps.sh
 
 HOSTCC			= gcc
diff --git a/configs/c5471evm/nsh/Make.defs b/configs/c5471evm/nsh/Make.defs
index 68a15703e3a..8d3a3adc1c7 100644
--- a/configs/c5471evm/nsh/Make.defs
+++ b/configs/c5471evm/nsh/Make.defs
@@ -48,7 +48,7 @@ OBJDUMP			= $(CROSSDEV)objdump
 ARCHCCVERSION		= ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR		= ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -82,11 +82,10 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
-
 MKDEP			= $(TOPDIR)/tools/mkdeps.sh
 
 HOSTCC			= gcc
diff --git a/configs/c5471evm/ostest/Make.defs b/configs/c5471evm/ostest/Make.defs
index 8a0f8c812f1..c8345917329 100644
--- a/configs/c5471evm/ostest/Make.defs
+++ b/configs/c5471evm/ostest/Make.defs
@@ -48,7 +48,7 @@ OBJDUMP			= $(CROSSDEV)objdump
 ARCHCCVERSION		= ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR		= ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -82,11 +82,10 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
-
 MKDEP			= $(TOPDIR)/tools/mkdeps.sh
 
 HOSTCC			= gcc
diff --git a/configs/compal_e88/nsh_highram/Make.defs b/configs/compal_e88/nsh_highram/Make.defs
index c5890828f88..2d65c2782f6 100644
--- a/configs/compal_e88/nsh_highram/Make.defs
+++ b/configs/compal_e88/nsh_highram/Make.defs
@@ -57,7 +57,7 @@ OBJDUMP			= $(CROSSDEV)objdump
 ARCHCCVERSION		= ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR		= ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -91,7 +91,7 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
diff --git a/configs/compal_e99/nsh_compalram/Make.defs b/configs/compal_e99/nsh_compalram/Make.defs
index 16e38b666b0..f93a01f04c8 100644
--- a/configs/compal_e99/nsh_compalram/Make.defs
+++ b/configs/compal_e99/nsh_compalram/Make.defs
@@ -57,7 +57,7 @@ OBJDUMP			= $(CROSSDEV)objdump
 ARCHCCVERSION		= ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR		= ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -91,7 +91,7 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
diff --git a/configs/compal_e99/nsh_highram/Make.defs b/configs/compal_e99/nsh_highram/Make.defs
index c5890828f88..2d65c2782f6 100644
--- a/configs/compal_e99/nsh_highram/Make.defs
+++ b/configs/compal_e99/nsh_highram/Make.defs
@@ -57,7 +57,7 @@ OBJDUMP			= $(CROSSDEV)objdump
 ARCHCCVERSION		= ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR		= ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -91,7 +91,7 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
diff --git a/configs/demo9s12ne64/ostest/Make.defs b/configs/demo9s12ne64/ostest/Make.defs
index 9edf5adf9c6..e6fdb9952f4 100644
--- a/configs/demo9s12ne64/ostest/Make.defs
+++ b/configs/demo9s12ne64/ostest/Make.defs
@@ -84,7 +84,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ea3131/nsh/Make.defs b/configs/ea3131/nsh/Make.defs
index 28e881ccb4a..a061eb22cf8 100644
--- a/configs/ea3131/nsh/Make.defs
+++ b/configs/ea3131/nsh/Make.defs
@@ -88,7 +88,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ea3131/ostest/Make.defs b/configs/ea3131/ostest/Make.defs
index ed7eb92903a..ba750e2122f 100644
--- a/configs/ea3131/ostest/Make.defs
+++ b/configs/ea3131/ostest/Make.defs
@@ -88,7 +88,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ea3131/pgnsh/Make.defs b/configs/ea3131/pgnsh/Make.defs
index 7b09759eadf..c142319dea0 100644
--- a/configs/ea3131/pgnsh/Make.defs
+++ b/configs/ea3131/pgnsh/Make.defs
@@ -88,7 +88,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ea3131/usbserial/Make.defs b/configs/ea3131/usbserial/Make.defs
index 614221fb37f..ef64e261577 100644
--- a/configs/ea3131/usbserial/Make.defs
+++ b/configs/ea3131/usbserial/Make.defs
@@ -88,7 +88,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ea3131/usbstorage/Make.defs b/configs/ea3131/usbstorage/Make.defs
index 4aa007069e0..7393606158d 100644
--- a/configs/ea3131/usbstorage/Make.defs
+++ b/configs/ea3131/usbstorage/Make.defs
@@ -88,7 +88,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ea3152/ostest/Make.defs b/configs/ea3152/ostest/Make.defs
index 8ca8f6e6a9b..f69eb5e957e 100644
--- a/configs/ea3152/ostest/Make.defs
+++ b/configs/ea3152/ostest/Make.defs
@@ -88,7 +88,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/eagle100/httpd/Make.defs b/configs/eagle100/httpd/Make.defs
index 4d5024d2471..ef5b28ede57 100644
--- a/configs/eagle100/httpd/Make.defs
+++ b/configs/eagle100/httpd/Make.defs
@@ -74,7 +74,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/eagle100/nettest/Make.defs b/configs/eagle100/nettest/Make.defs
index 98b544ed9bd..ac9e7853b3d 100644
--- a/configs/eagle100/nettest/Make.defs
+++ b/configs/eagle100/nettest/Make.defs
@@ -74,7 +74,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/eagle100/nsh/Make.defs b/configs/eagle100/nsh/Make.defs
index efd473f7ab1..3bc31ce777f 100644
--- a/configs/eagle100/nsh/Make.defs
+++ b/configs/eagle100/nsh/Make.defs
@@ -74,7 +74,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/eagle100/nxflat/Make.defs b/configs/eagle100/nxflat/Make.defs
index 6c6965d202d..2c8aa9c44d1 100644
--- a/configs/eagle100/nxflat/Make.defs
+++ b/configs/eagle100/nxflat/Make.defs
@@ -77,7 +77,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/eagle100/ostest/Make.defs b/configs/eagle100/ostest/Make.defs
index f28f6d90bef..4eb37853b0d 100644
--- a/configs/eagle100/ostest/Make.defs
+++ b/configs/eagle100/ostest/Make.defs
@@ -74,7 +74,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/eagle100/thttpd/Make.defs b/configs/eagle100/thttpd/Make.defs
index 83abbe411a8..dbdfddf1b5a 100644
--- a/configs/eagle100/thttpd/Make.defs
+++ b/configs/eagle100/thttpd/Make.defs
@@ -77,7 +77,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ekk-lm3s9b96/nsh/Make.defs b/configs/ekk-lm3s9b96/nsh/Make.defs
index c14dccbb912..1563e73a972 100644
--- a/configs/ekk-lm3s9b96/nsh/Make.defs
+++ b/configs/ekk-lm3s9b96/nsh/Make.defs
@@ -97,7 +97,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ekk-lm3s9b96/ostest/Make.defs b/configs/ekk-lm3s9b96/ostest/Make.defs
index 4068b73fd4b..b052c86aeb7 100644
--- a/configs/ekk-lm3s9b96/ostest/Make.defs
+++ b/configs/ekk-lm3s9b96/ostest/Make.defs
@@ -97,7 +97,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ez80f910200kitg/ostest/Make.defs b/configs/ez80f910200kitg/ostest/Make.defs
index 4eaf34fe01b..88280d8ecb9 100644
--- a/configs/ez80f910200kitg/ostest/Make.defs
+++ b/configs/ez80f910200kitg/ostest/Make.defs
@@ -80,7 +80,7 @@ ARCHCPUDEF		= _EZ80F91
 ARCHFAMILY		= _EZ80ACCLAIM!
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug -NOsdiopt
 else
   ARCHASMOPTIMIZATION	= -nodebug -NOsdiopt
@@ -97,7 +97,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -optsize
diff --git a/configs/ez80f910200zco/dhcpd/Make.defs b/configs/ez80f910200zco/dhcpd/Make.defs
index 326ea137b29..d8e7d33fe4e 100644
--- a/configs/ez80f910200zco/dhcpd/Make.defs
+++ b/configs/ez80f910200zco/dhcpd/Make.defs
@@ -80,7 +80,7 @@ ARCHCPUDEF		= _EZ80F91
 ARCHFAMILY		= _EZ80ACCLAIM!
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug -NOsdiopt
 else
   ARCHASMOPTIMIZATION	= -nodebug -NOsdiopt
@@ -97,7 +97,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -optsize
diff --git a/configs/ez80f910200zco/httpd/Make.defs b/configs/ez80f910200zco/httpd/Make.defs
index 6a30c70004d..2a8ffb04f19 100644
--- a/configs/ez80f910200zco/httpd/Make.defs
+++ b/configs/ez80f910200zco/httpd/Make.defs
@@ -80,7 +80,7 @@ ARCHCPUDEF		= _EZ80F91
 ARCHFAMILY		= _EZ80ACCLAIM!
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug -NOsdiopt
 else
   ARCHASMOPTIMIZATION	= -nodebug -NOsdiopt
@@ -97,7 +97,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -optsize
diff --git a/configs/ez80f910200zco/nettest/Make.defs b/configs/ez80f910200zco/nettest/Make.defs
index ce323666431..95a5b4201bc 100644
--- a/configs/ez80f910200zco/nettest/Make.defs
+++ b/configs/ez80f910200zco/nettest/Make.defs
@@ -80,7 +80,7 @@ ARCHCPUDEF		= _EZ80F91
 ARCHFAMILY		= _EZ80ACCLAIM!
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug -NOsdiopt
 else
   ARCHASMOPTIMIZATION	= -nodebug -NOsdiopt
@@ -97,7 +97,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -optsize
diff --git a/configs/ez80f910200zco/nsh/Make.defs b/configs/ez80f910200zco/nsh/Make.defs
index 9dbaceb6450..978e406b787 100644
--- a/configs/ez80f910200zco/nsh/Make.defs
+++ b/configs/ez80f910200zco/nsh/Make.defs
@@ -80,7 +80,7 @@ ARCHCPUDEF		= _EZ80F91
 ARCHFAMILY		= _EZ80ACCLAIM!
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug -NOsdiopt
 else
   ARCHASMOPTIMIZATION	= -nodebug -NOsdiopt
@@ -97,7 +97,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -optsize
diff --git a/configs/ez80f910200zco/ostest/Make.defs b/configs/ez80f910200zco/ostest/Make.defs
index 6a49cbc5738..1a2759cff3a 100644
--- a/configs/ez80f910200zco/ostest/Make.defs
+++ b/configs/ez80f910200zco/ostest/Make.defs
@@ -80,7 +80,7 @@ ARCHCPUDEF = _EZ80F91
 ARCHFAMILY = _EZ80ACCLAIM!
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION = -debug -NOsdiopt
 else
   ARCHASMOPTIMIZATION = -nodebug -NOsdiopt
@@ -97,7 +97,7 @@ AFLAGS = $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -debug -reduceopt
 else
   ARCHOPTIMIZATION = -nodebug -optsize
diff --git a/configs/ez80f910200zco/poll/Make.defs b/configs/ez80f910200zco/poll/Make.defs
index fd32a6df63e..c9a9a83ea03 100644
--- a/configs/ez80f910200zco/poll/Make.defs
+++ b/configs/ez80f910200zco/poll/Make.defs
@@ -80,7 +80,7 @@ ARCHCPUDEF		= _EZ80F91
 ARCHFAMILY		= _EZ80ACCLAIM!
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug -NOsdiopt
 else
   ARCHASMOPTIMIZATION	= -nodebug -NOsdiopt
@@ -97,7 +97,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -optsize
diff --git a/configs/fire-stm32v2/nsh/Make.defs b/configs/fire-stm32v2/nsh/Make.defs
index bd63f7c6bea..271d4ab17c4 100644
--- a/configs/fire-stm32v2/nsh/Make.defs
+++ b/configs/fire-stm32v2/nsh/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/hymini-stm32v/buttons/Make.defs b/configs/hymini-stm32v/buttons/Make.defs
index 565729c1a19..fde36e025b5 100644
--- a/configs/hymini-stm32v/buttons/Make.defs
+++ b/configs/hymini-stm32v/buttons/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/hymini-stm32v/nsh/Make.defs b/configs/hymini-stm32v/nsh/Make.defs
index 285bbe40ab6..f819679f297 100644
--- a/configs/hymini-stm32v/nsh/Make.defs
+++ b/configs/hymini-stm32v/nsh/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/hymini-stm32v/nsh2/Make.defs b/configs/hymini-stm32v/nsh2/Make.defs
index 9ad8c2774ad..c1c55a1f707 100644
--- a/configs/hymini-stm32v/nsh2/Make.defs
+++ b/configs/hymini-stm32v/nsh2/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/hymini-stm32v/nx/Make.defs b/configs/hymini-stm32v/nx/Make.defs
index 84700e0828b..2d26b881b12 100644
--- a/configs/hymini-stm32v/nx/Make.defs
+++ b/configs/hymini-stm32v/nx/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/hymini-stm32v/nxlines/Make.defs b/configs/hymini-stm32v/nxlines/Make.defs
index b9e8841f0a8..1970020f1b4 100644
--- a/configs/hymini-stm32v/nxlines/Make.defs
+++ b/configs/hymini-stm32v/nxlines/Make.defs
@@ -110,7 +110,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/hymini-stm32v/usbserial/Make.defs b/configs/hymini-stm32v/usbserial/Make.defs
index 559af81de56..68a0618b0a2 100644
--- a/configs/hymini-stm32v/usbserial/Make.defs
+++ b/configs/hymini-stm32v/usbserial/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/hymini-stm32v/usbstorage/Make.defs b/configs/hymini-stm32v/usbstorage/Make.defs
index 5fef4f705da..b59091c5e51 100644
--- a/configs/hymini-stm32v/usbstorage/Make.defs
+++ b/configs/hymini-stm32v/usbstorage/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/kwikstik-k40/ostest/Make.defs b/configs/kwikstik-k40/ostest/Make.defs
index f239d872d43..7f260d2671d 100644
--- a/configs/kwikstik-k40/ostest/Make.defs
+++ b/configs/kwikstik-k40/ostest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lincoln60/nsh/Make.defs b/configs/lincoln60/nsh/Make.defs
index cf76f97f285..8d172702404 100644
--- a/configs/lincoln60/nsh/Make.defs
+++ b/configs/lincoln60/nsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lincoln60/ostest/Make.defs b/configs/lincoln60/ostest/Make.defs
index 044b27dc43a..e8a4ec3ea5e 100644
--- a/configs/lincoln60/ostest/Make.defs
+++ b/configs/lincoln60/ostest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lm3s6432-s2e/nsh/Make.defs b/configs/lm3s6432-s2e/nsh/Make.defs
index 795d928d2e9..6597c42838d 100644
--- a/configs/lm3s6432-s2e/nsh/Make.defs
+++ b/configs/lm3s6432-s2e/nsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lm3s6432-s2e/ostest/Make.defs b/configs/lm3s6432-s2e/ostest/Make.defs
index 8a0fc031750..3ac4c12ac42 100644
--- a/configs/lm3s6432-s2e/ostest/Make.defs
+++ b/configs/lm3s6432-s2e/ostest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lm3s6965-ek/nsh/Make.defs b/configs/lm3s6965-ek/nsh/Make.defs
index 72ea6b151e2..d8c4978bda1 100644
--- a/configs/lm3s6965-ek/nsh/Make.defs
+++ b/configs/lm3s6965-ek/nsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lm3s6965-ek/nx/Make.defs b/configs/lm3s6965-ek/nx/Make.defs
index 2a409101bb0..eccfcde0794 100644
--- a/configs/lm3s6965-ek/nx/Make.defs
+++ b/configs/lm3s6965-ek/nx/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lm3s6965-ek/ostest/Make.defs b/configs/lm3s6965-ek/ostest/Make.defs
index ae376da0c51..fe15153db32 100644
--- a/configs/lm3s6965-ek/ostest/Make.defs
+++ b/configs/lm3s6965-ek/ostest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lm3s8962-ek/nsh/Make.defs b/configs/lm3s8962-ek/nsh/Make.defs
index b0b57559c0d..3269059c9b3 100644
--- a/configs/lm3s8962-ek/nsh/Make.defs
+++ b/configs/lm3s8962-ek/nsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lm3s8962-ek/nx/Make.defs b/configs/lm3s8962-ek/nx/Make.defs
index 7d0d0aa55ba..5c2bab91549 100644
--- a/configs/lm3s8962-ek/nx/Make.defs
+++ b/configs/lm3s8962-ek/nx/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lm3s8962-ek/ostest/Make.defs b/configs/lm3s8962-ek/ostest/Make.defs
index 50368f34f26..19b7fef1d1c 100644
--- a/configs/lm3s8962-ek/ostest/Make.defs
+++ b/configs/lm3s8962-ek/ostest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lpc4330-xplorer/nsh/Make.defs b/configs/lpc4330-xplorer/nsh/Make.defs
index 51439ac2275..49fc903aa1d 100644
--- a/configs/lpc4330-xplorer/nsh/Make.defs
+++ b/configs/lpc4330-xplorer/nsh/Make.defs
@@ -153,7 +153,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lpc4330-xplorer/ostest/Make.defs b/configs/lpc4330-xplorer/ostest/Make.defs
index 51439ac2275..49fc903aa1d 100644
--- a/configs/lpc4330-xplorer/ostest/Make.defs
+++ b/configs/lpc4330-xplorer/ostest/Make.defs
@@ -153,7 +153,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lpcxpresso-lpc1768/dhcpd/Make.defs b/configs/lpcxpresso-lpc1768/dhcpd/Make.defs
index eebe11c22a1..5c7bd715eb1 100644
--- a/configs/lpcxpresso-lpc1768/dhcpd/Make.defs
+++ b/configs/lpcxpresso-lpc1768/dhcpd/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lpcxpresso-lpc1768/nsh/Make.defs b/configs/lpcxpresso-lpc1768/nsh/Make.defs
index c8fb0e9aec5..020006de326 100644
--- a/configs/lpcxpresso-lpc1768/nsh/Make.defs
+++ b/configs/lpcxpresso-lpc1768/nsh/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lpcxpresso-lpc1768/nx/Make.defs b/configs/lpcxpresso-lpc1768/nx/Make.defs
index b0334ba46d2..79390242bb3 100644
--- a/configs/lpcxpresso-lpc1768/nx/Make.defs
+++ b/configs/lpcxpresso-lpc1768/nx/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lpcxpresso-lpc1768/ostest/Make.defs b/configs/lpcxpresso-lpc1768/ostest/Make.defs
index 1e1f2d97952..5a99725c073 100644
--- a/configs/lpcxpresso-lpc1768/ostest/Make.defs
+++ b/configs/lpcxpresso-lpc1768/ostest/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lpcxpresso-lpc1768/thttpd/Make.defs b/configs/lpcxpresso-lpc1768/thttpd/Make.defs
index 93bcfa376ee..9fe82fe83a3 100644
--- a/configs/lpcxpresso-lpc1768/thttpd/Make.defs
+++ b/configs/lpcxpresso-lpc1768/thttpd/Make.defs
@@ -113,7 +113,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/lpcxpresso-lpc1768/usbstorage/Make.defs b/configs/lpcxpresso-lpc1768/usbstorage/Make.defs
index e546666e75e..a42b8e84a6f 100644
--- a/configs/lpcxpresso-lpc1768/usbstorage/Make.defs
+++ b/configs/lpcxpresso-lpc1768/usbstorage/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/m68332evb/Make.defs b/configs/m68332evb/Make.defs
index fb85cf82722..6f6ae7ad076 100644
--- a/configs/m68332evb/Make.defs
+++ b/configs/m68332evb/Make.defs
@@ -36,7 +36,7 @@
 include ${TOPDIR}/.config
 include ${TOPDIR}/tools/Config.mk
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -68,7 +68,7 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
diff --git a/configs/mbed/hidkbd/Make.defs b/configs/mbed/hidkbd/Make.defs
index 92c6c7ceaae..b11b33d6d34 100644
--- a/configs/mbed/hidkbd/Make.defs
+++ b/configs/mbed/hidkbd/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mbed/nsh/Make.defs b/configs/mbed/nsh/Make.defs
index 9a72736d265..a7bc14423fa 100644
--- a/configs/mbed/nsh/Make.defs
+++ b/configs/mbed/nsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mcu123-lpc214x/composite/Make.defs b/configs/mcu123-lpc214x/composite/Make.defs
index 7b9b8f22ff5..28dbf31579b 100644
--- a/configs/mcu123-lpc214x/composite/Make.defs
+++ b/configs/mcu123-lpc214x/composite/Make.defs
@@ -80,7 +80,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mcu123-lpc214x/nsh/Make.defs b/configs/mcu123-lpc214x/nsh/Make.defs
index ddccbb47347..d9ae7e305a5 100644
--- a/configs/mcu123-lpc214x/nsh/Make.defs
+++ b/configs/mcu123-lpc214x/nsh/Make.defs
@@ -80,7 +80,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mcu123-lpc214x/ostest/Make.defs b/configs/mcu123-lpc214x/ostest/Make.defs
index 255515a42e3..76b9e7abb0c 100644
--- a/configs/mcu123-lpc214x/ostest/Make.defs
+++ b/configs/mcu123-lpc214x/ostest/Make.defs
@@ -80,7 +80,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mcu123-lpc214x/usbserial/Make.defs b/configs/mcu123-lpc214x/usbserial/Make.defs
index 6f05d79f733..5490d690f8a 100644
--- a/configs/mcu123-lpc214x/usbserial/Make.defs
+++ b/configs/mcu123-lpc214x/usbserial/Make.defs
@@ -80,7 +80,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mcu123-lpc214x/usbstorage/Make.defs b/configs/mcu123-lpc214x/usbstorage/Make.defs
index 35ea7af7ab0..408d19c234f 100644
--- a/configs/mcu123-lpc214x/usbstorage/Make.defs
+++ b/configs/mcu123-lpc214x/usbstorage/Make.defs
@@ -80,7 +80,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/micropendous3/hello/Make.defs b/configs/micropendous3/hello/Make.defs
index bd48d79c9eb..69073bb438d 100644
--- a/configs/micropendous3/hello/Make.defs
+++ b/configs/micropendous3/hello/Make.defs
@@ -88,7 +88,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mirtoo/nsh/Make.defs b/configs/mirtoo/nsh/Make.defs
index de0a190f669..28ea99ab04c 100644
--- a/configs/mirtoo/nsh/Make.defs
+++ b/configs/mirtoo/nsh/Make.defs
@@ -134,7 +134,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mirtoo/nxffs/Make.defs b/configs/mirtoo/nxffs/Make.defs
index a6992ee533b..09989324e50 100644
--- a/configs/mirtoo/nxffs/Make.defs
+++ b/configs/mirtoo/nxffs/Make.defs
@@ -134,7 +134,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mirtoo/ostest/Make.defs b/configs/mirtoo/ostest/Make.defs
index 71bd9d5baa6..7a087665b9f 100644
--- a/configs/mirtoo/ostest/Make.defs
+++ b/configs/mirtoo/ostest/Make.defs
@@ -134,7 +134,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/mx1ads/ostest/Make.defs b/configs/mx1ads/ostest/Make.defs
index 9b9c61df8f6..0e261775f4f 100644
--- a/configs/mx1ads/ostest/Make.defs
+++ b/configs/mx1ads/ostest/Make.defs
@@ -54,7 +54,7 @@ ARCHCXXFLAGS		= -fno-builtin -fno-exceptions
 ARCHWARNINGS		= -Wall -Wstrict-prototypes -Wshadow
 ARCHWARNINGSXX		= -Wall -Wshadow
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -92,7 +92,7 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
diff --git a/configs/ne64badge/ostest/Make.defs b/configs/ne64badge/ostest/Make.defs
index 2858d30f1d0..870313d73f6 100644
--- a/configs/ne64badge/ostest/Make.defs
+++ b/configs/ne64badge/ostest/Make.defs
@@ -84,7 +84,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ntosd-dm320/nettest/Make.defs b/configs/ntosd-dm320/nettest/Make.defs
index e28c1a3609a..8c5b7e93b95 100644
--- a/configs/ntosd-dm320/nettest/Make.defs
+++ b/configs/ntosd-dm320/nettest/Make.defs
@@ -90,7 +90,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ntosd-dm320/nsh/Make.defs b/configs/ntosd-dm320/nsh/Make.defs
index aff7f4240b7..fa61494062e 100644
--- a/configs/ntosd-dm320/nsh/Make.defs
+++ b/configs/ntosd-dm320/nsh/Make.defs
@@ -90,7 +90,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ntosd-dm320/ostest/Make.defs b/configs/ntosd-dm320/ostest/Make.defs
index 6766b49153a..9b2ab9e5e22 100644
--- a/configs/ntosd-dm320/ostest/Make.defs
+++ b/configs/ntosd-dm320/ostest/Make.defs
@@ -90,7 +90,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ntosd-dm320/poll/Make.defs b/configs/ntosd-dm320/poll/Make.defs
index a111fed6578..69c20da9443 100644
--- a/configs/ntosd-dm320/poll/Make.defs
+++ b/configs/ntosd-dm320/poll/Make.defs
@@ -90,7 +90,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ntosd-dm320/thttpd/Make.defs b/configs/ntosd-dm320/thttpd/Make.defs
index a0e501376e8..252416f6bf5 100644
--- a/configs/ntosd-dm320/thttpd/Make.defs
+++ b/configs/ntosd-dm320/thttpd/Make.defs
@@ -90,7 +90,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ntosd-dm320/udp/Make.defs b/configs/ntosd-dm320/udp/Make.defs
index 16ed8ecebfd..0cdb9f05dc3 100644
--- a/configs/ntosd-dm320/udp/Make.defs
+++ b/configs/ntosd-dm320/udp/Make.defs
@@ -90,7 +90,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ntosd-dm320/uip/Make.defs b/configs/ntosd-dm320/uip/Make.defs
index d9425c05ebf..64bb4494b45 100644
--- a/configs/ntosd-dm320/uip/Make.defs
+++ b/configs/ntosd-dm320/uip/Make.defs
@@ -90,7 +90,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/nucleus2g/nsh/Make.defs b/configs/nucleus2g/nsh/Make.defs
index aed194e1045..7b82800bfdd 100644
--- a/configs/nucleus2g/nsh/Make.defs
+++ b/configs/nucleus2g/nsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/nucleus2g/ostest/Make.defs b/configs/nucleus2g/ostest/Make.defs
index 239424083b8..b0ec211649c 100644
--- a/configs/nucleus2g/ostest/Make.defs
+++ b/configs/nucleus2g/ostest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/nucleus2g/usbserial/Make.defs b/configs/nucleus2g/usbserial/Make.defs
index 81f17e86d2b..04e94eda90c 100644
--- a/configs/nucleus2g/usbserial/Make.defs
+++ b/configs/nucleus2g/usbserial/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/nucleus2g/usbstorage/Make.defs b/configs/nucleus2g/usbstorage/Make.defs
index 06af74d3970..3e15c52d04e 100644
--- a/configs/nucleus2g/usbstorage/Make.defs
+++ b/configs/nucleus2g/usbstorage/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/ftpc/Make.defs b/configs/olimex-lpc1766stk/ftpc/Make.defs
index 674ad76929b..91bd0e27cb9 100644
--- a/configs/olimex-lpc1766stk/ftpc/Make.defs
+++ b/configs/olimex-lpc1766stk/ftpc/Make.defs
@@ -99,7 +99,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/hidkbd/Make.defs b/configs/olimex-lpc1766stk/hidkbd/Make.defs
index 3c68d370d04..c785dc7b7c5 100644
--- a/configs/olimex-lpc1766stk/hidkbd/Make.defs
+++ b/configs/olimex-lpc1766stk/hidkbd/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/nettest/Make.defs b/configs/olimex-lpc1766stk/nettest/Make.defs
index 57f2b7a5587..119acc0f693 100644
--- a/configs/olimex-lpc1766stk/nettest/Make.defs
+++ b/configs/olimex-lpc1766stk/nettest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/nsh/Make.defs b/configs/olimex-lpc1766stk/nsh/Make.defs
index c9ecf51db78..ea6ad5670b0 100644
--- a/configs/olimex-lpc1766stk/nsh/Make.defs
+++ b/configs/olimex-lpc1766stk/nsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/nx/Make.defs b/configs/olimex-lpc1766stk/nx/Make.defs
index 64c98149252..67d74dcde1d 100644
--- a/configs/olimex-lpc1766stk/nx/Make.defs
+++ b/configs/olimex-lpc1766stk/nx/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/ostest/Make.defs b/configs/olimex-lpc1766stk/ostest/Make.defs
index 2f33642bfca..78618bddbed 100644
--- a/configs/olimex-lpc1766stk/ostest/Make.defs
+++ b/configs/olimex-lpc1766stk/ostest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/slip-httpd/Make.defs b/configs/olimex-lpc1766stk/slip-httpd/Make.defs
index fc49b69814a..4f217561ff9 100644
--- a/configs/olimex-lpc1766stk/slip-httpd/Make.defs
+++ b/configs/olimex-lpc1766stk/slip-httpd/Make.defs
@@ -99,7 +99,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/thttpd/Make.defs b/configs/olimex-lpc1766stk/thttpd/Make.defs
index bb4df618b2e..e7095d93791 100644
--- a/configs/olimex-lpc1766stk/thttpd/Make.defs
+++ b/configs/olimex-lpc1766stk/thttpd/Make.defs
@@ -99,7 +99,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/usbserial/Make.defs b/configs/olimex-lpc1766stk/usbserial/Make.defs
index b4716971df6..0ff4bb94afb 100644
--- a/configs/olimex-lpc1766stk/usbserial/Make.defs
+++ b/configs/olimex-lpc1766stk/usbserial/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/usbstorage/Make.defs b/configs/olimex-lpc1766stk/usbstorage/Make.defs
index ed338c8b266..c7f954ff9aa 100644
--- a/configs/olimex-lpc1766stk/usbstorage/Make.defs
+++ b/configs/olimex-lpc1766stk/usbstorage/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-lpc1766stk/wlan/Make.defs b/configs/olimex-lpc1766stk/wlan/Make.defs
index 08f55feab7c..31f4023e6ad 100644
--- a/configs/olimex-lpc1766stk/wlan/Make.defs
+++ b/configs/olimex-lpc1766stk/wlan/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-stm32-p107/nsh/Make.defs b/configs/olimex-stm32-p107/nsh/Make.defs
index 3314a82bef3..f88fb67312c 100644
--- a/configs/olimex-stm32-p107/nsh/Make.defs
+++ b/configs/olimex-stm32-p107/nsh/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-stm32-p107/ostest/Make.defs b/configs/olimex-stm32-p107/ostest/Make.defs
index fdceac03ba8..2a1bc6d9cd0 100644
--- a/configs/olimex-stm32-p107/ostest/Make.defs
+++ b/configs/olimex-stm32-p107/ostest/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-strp711/nettest/Make.defs b/configs/olimex-strp711/nettest/Make.defs
index 64259e91997..f14c0789414 100644
--- a/configs/olimex-strp711/nettest/Make.defs
+++ b/configs/olimex-strp711/nettest/Make.defs
@@ -80,7 +80,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-strp711/nsh/Make.defs b/configs/olimex-strp711/nsh/Make.defs
index 69c6b4c2776..a16447aec30 100644
--- a/configs/olimex-strp711/nsh/Make.defs
+++ b/configs/olimex-strp711/nsh/Make.defs
@@ -80,7 +80,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/olimex-strp711/ostest/Make.defs b/configs/olimex-strp711/ostest/Make.defs
index 722a45951e1..a4fe11a0277 100644
--- a/configs/olimex-strp711/ostest/Make.defs
+++ b/configs/olimex-strp711/ostest/Make.defs
@@ -80,7 +80,7 @@ else
   MAXOPTIMIZATION	= -O2
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/pcblogic-pic32mx/nsh/Make.defs b/configs/pcblogic-pic32mx/nsh/Make.defs
index 9608ce0ee4c..166378988e1 100644
--- a/configs/pcblogic-pic32mx/nsh/Make.defs
+++ b/configs/pcblogic-pic32mx/nsh/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/pcblogic-pic32mx/ostest/Make.defs b/configs/pcblogic-pic32mx/ostest/Make.defs
index 0376ee339fd..834a8ed53e9 100644
--- a/configs/pcblogic-pic32mx/ostest/Make.defs
+++ b/configs/pcblogic-pic32mx/ostest/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/pic32-starterkit/nsh/Make.defs b/configs/pic32-starterkit/nsh/Make.defs
index 962801567f9..1063e57becf 100644
--- a/configs/pic32-starterkit/nsh/Make.defs
+++ b/configs/pic32-starterkit/nsh/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/pic32-starterkit/nsh2/Make.defs b/configs/pic32-starterkit/nsh2/Make.defs
index 2068db849db..730ec22b6f5 100644
--- a/configs/pic32-starterkit/nsh2/Make.defs
+++ b/configs/pic32-starterkit/nsh2/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/pic32-starterkit/ostest/Make.defs b/configs/pic32-starterkit/ostest/Make.defs
index 370ac7f1fbd..d5eb4fb7f09 100644
--- a/configs/pic32-starterkit/ostest/Make.defs
+++ b/configs/pic32-starterkit/ostest/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/pic32mx7mmb/nsh/Make.defs b/configs/pic32mx7mmb/nsh/Make.defs
index ed776bc1918..249c359d4d1 100644
--- a/configs/pic32mx7mmb/nsh/Make.defs
+++ b/configs/pic32mx7mmb/nsh/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/pic32mx7mmb/ostest/Make.defs b/configs/pic32mx7mmb/ostest/Make.defs
index 54806fb95ad..4196872a7fa 100644
--- a/configs/pic32mx7mmb/ostest/Make.defs
+++ b/configs/pic32mx7mmb/ostest/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/pjrc-8051/Make.defs b/configs/pjrc-8051/Make.defs
index 5d259454799..5cf9fadf13b 100644
--- a/configs/pjrc-8051/Make.defs
+++ b/configs/pjrc-8051/Make.defs
@@ -36,7 +36,7 @@
 include ${TOPDIR}/.config
 include ${TOPDIR}/tools/Config.mk
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= --debug
 else
   ARCHOPTIMIZATION	=
diff --git a/configs/qemu-i486/nsh/Make.defs b/configs/qemu-i486/nsh/Make.defs
index 8b5fe61f65c..dd518a5afce 100644
--- a/configs/qemu-i486/nsh/Make.defs
+++ b/configs/qemu-i486/nsh/Make.defs
@@ -99,7 +99,7 @@ OBJEXT = .o
 LIBEXT = .a
 EXEEXT = .elf
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS += -g
 endif
 
diff --git a/configs/qemu-i486/ostest/Make.defs b/configs/qemu-i486/ostest/Make.defs
index 0a2423456ed..7bec9327bd7 100644
--- a/configs/qemu-i486/ostest/Make.defs
+++ b/configs/qemu-i486/ostest/Make.defs
@@ -99,7 +99,7 @@ OBJEXT = .o
 LIBEXT = .a
 EXEEXT = .elf
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS += -g
 endif
 
diff --git a/configs/sam3u-ek/knsh/Make.defs b/configs/sam3u-ek/knsh/Make.defs
index a402a4d5121..b6275f283f7 100644
--- a/configs/sam3u-ek/knsh/Make.defs
+++ b/configs/sam3u-ek/knsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/sam3u-ek/nsh/Make.defs b/configs/sam3u-ek/nsh/Make.defs
index 337b98df842..f314f6765c8 100644
--- a/configs/sam3u-ek/nsh/Make.defs
+++ b/configs/sam3u-ek/nsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/sam3u-ek/nx/Make.defs b/configs/sam3u-ek/nx/Make.defs
index 86a1c5c38ed..10ef94ff3f3 100644
--- a/configs/sam3u-ek/nx/Make.defs
+++ b/configs/sam3u-ek/nx/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/sam3u-ek/ostest/Make.defs b/configs/sam3u-ek/ostest/Make.defs
index 25f386df756..167b9217bff 100644
--- a/configs/sam3u-ek/ostest/Make.defs
+++ b/configs/sam3u-ek/ostest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/sam3u-ek/touchscreen/Make.defs b/configs/sam3u-ek/touchscreen/Make.defs
index fce80ec256e..a1f1e715141 100644
--- a/configs/sam3u-ek/touchscreen/Make.defs
+++ b/configs/sam3u-ek/touchscreen/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/shenzhou/nsh/Make.defs b/configs/shenzhou/nsh/Make.defs
index 81dedb8bba0..ef2bf35fb01 100644
--- a/configs/shenzhou/nsh/Make.defs
+++ b/configs/shenzhou/nsh/Make.defs
@@ -130,7 +130,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/shenzhou/nxwm/Make.defs b/configs/shenzhou/nxwm/Make.defs
index 84e0df782d1..66e4945b125 100644
--- a/configs/shenzhou/nxwm/Make.defs
+++ b/configs/shenzhou/nxwm/Make.defs
@@ -130,7 +130,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/shenzhou/thttpd/Make.defs b/configs/shenzhou/thttpd/Make.defs
index 99aed6a5141..8773aee1b35 100644
--- a/configs/shenzhou/thttpd/Make.defs
+++ b/configs/shenzhou/thttpd/Make.defs
@@ -133,7 +133,7 @@ LDNXFLAT = ldnxflat
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/skp16c26/ostest/Make.defs b/configs/skp16c26/ostest/Make.defs
index a7444daae34..7f1ab651a99 100644
--- a/configs/skp16c26/ostest/Make.defs
+++ b/configs/skp16c26/ostest/Make.defs
@@ -48,7 +48,7 @@ OBJDUMP			= $(CROSSDEV)objdump
 ARCHCCVERSION		= ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR		= ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
@@ -70,7 +70,7 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
diff --git a/configs/stm3210e-eval/RIDE/Make.defs b/configs/stm3210e-eval/RIDE/Make.defs
index 6e69590c7ae..33c95f4cf3a 100644
--- a/configs/stm3210e-eval/RIDE/Make.defs
+++ b/configs/stm3210e-eval/RIDE/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/buttons/Make.defs b/configs/stm3210e-eval/buttons/Make.defs
index 860d81c1fbe..0ff9bef0cd6 100644
--- a/configs/stm3210e-eval/buttons/Make.defs
+++ b/configs/stm3210e-eval/buttons/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/composite/Make.defs b/configs/stm3210e-eval/composite/Make.defs
index c0d85bf2271..5c22eb8e439 100644
--- a/configs/stm3210e-eval/composite/Make.defs
+++ b/configs/stm3210e-eval/composite/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/nsh/Make.defs b/configs/stm3210e-eval/nsh/Make.defs
index 03d19fbc80f..348c721d13d 100644
--- a/configs/stm3210e-eval/nsh/Make.defs
+++ b/configs/stm3210e-eval/nsh/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/nsh2/Make.defs b/configs/stm3210e-eval/nsh2/Make.defs
index f84c1155294..9cea646855d 100644
--- a/configs/stm3210e-eval/nsh2/Make.defs
+++ b/configs/stm3210e-eval/nsh2/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/nx/Make.defs b/configs/stm3210e-eval/nx/Make.defs
index 7f253873a19..b4f210369f7 100644
--- a/configs/stm3210e-eval/nx/Make.defs
+++ b/configs/stm3210e-eval/nx/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/nxconsole/Make.defs b/configs/stm3210e-eval/nxconsole/Make.defs
index 8993a53aab2..bb51b10f918 100644
--- a/configs/stm3210e-eval/nxconsole/Make.defs
+++ b/configs/stm3210e-eval/nxconsole/Make.defs
@@ -110,7 +110,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/nxlines/Make.defs b/configs/stm3210e-eval/nxlines/Make.defs
index 190ed098f8f..9f1de2f93bd 100644
--- a/configs/stm3210e-eval/nxlines/Make.defs
+++ b/configs/stm3210e-eval/nxlines/Make.defs
@@ -110,7 +110,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/nxtext/Make.defs b/configs/stm3210e-eval/nxtext/Make.defs
index d4f8ec2fe3d..d9775388648 100644
--- a/configs/stm3210e-eval/nxtext/Make.defs
+++ b/configs/stm3210e-eval/nxtext/Make.defs
@@ -110,7 +110,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/ostest/Make.defs b/configs/stm3210e-eval/ostest/Make.defs
index ef1a3d42344..ccb90fe2730 100644
--- a/configs/stm3210e-eval/ostest/Make.defs
+++ b/configs/stm3210e-eval/ostest/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/pm/Make.defs b/configs/stm3210e-eval/pm/Make.defs
index a60e4a77456..b5e08c9a083 100644
--- a/configs/stm3210e-eval/pm/Make.defs
+++ b/configs/stm3210e-eval/pm/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/usbserial/Make.defs b/configs/stm3210e-eval/usbserial/Make.defs
index f08d5b68c4d..9219e6099e3 100644
--- a/configs/stm3210e-eval/usbserial/Make.defs
+++ b/configs/stm3210e-eval/usbserial/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3210e-eval/usbstorage/Make.defs b/configs/stm3210e-eval/usbstorage/Make.defs
index 7f2cb73b668..2c9e2a9e1b1 100644
--- a/configs/stm3210e-eval/usbstorage/Make.defs
+++ b/configs/stm3210e-eval/usbstorage/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3220g-eval/dhcpd/Make.defs b/configs/stm3220g-eval/dhcpd/Make.defs
index e5a0e7b06aa..71cb52eea6a 100644
--- a/configs/stm3220g-eval/dhcpd/Make.defs
+++ b/configs/stm3220g-eval/dhcpd/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3220g-eval/nettest/Make.defs b/configs/stm3220g-eval/nettest/Make.defs
index 2a8976d089d..de62c905679 100644
--- a/configs/stm3220g-eval/nettest/Make.defs
+++ b/configs/stm3220g-eval/nettest/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3220g-eval/nsh/Make.defs b/configs/stm3220g-eval/nsh/Make.defs
index 23a57ab8006..fcb4bf93f75 100644
--- a/configs/stm3220g-eval/nsh/Make.defs
+++ b/configs/stm3220g-eval/nsh/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3220g-eval/nsh2/Make.defs b/configs/stm3220g-eval/nsh2/Make.defs
index 38335c1709a..af4359dd8bc 100644
--- a/configs/stm3220g-eval/nsh2/Make.defs
+++ b/configs/stm3220g-eval/nsh2/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3220g-eval/nxwm/Make.defs b/configs/stm3220g-eval/nxwm/Make.defs
index c4846c0c317..bb46adff7c0 100644
--- a/configs/stm3220g-eval/nxwm/Make.defs
+++ b/configs/stm3220g-eval/nxwm/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3220g-eval/ostest/Make.defs b/configs/stm3220g-eval/ostest/Make.defs
index e2de89cf74e..8e72558f944 100644
--- a/configs/stm3220g-eval/ostest/Make.defs
+++ b/configs/stm3220g-eval/ostest/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3220g-eval/telnetd/Make.defs b/configs/stm3220g-eval/telnetd/Make.defs
index 4004508d500..c82a2715a21 100644
--- a/configs/stm3220g-eval/telnetd/Make.defs
+++ b/configs/stm3220g-eval/telnetd/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/dhcpd/Make.defs b/configs/stm3240g-eval/dhcpd/Make.defs
index 5b1334a0738..599ad69ec72 100644
--- a/configs/stm3240g-eval/dhcpd/Make.defs
+++ b/configs/stm3240g-eval/dhcpd/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/discover/Make.defs b/configs/stm3240g-eval/discover/Make.defs
index 58afd390381..37280e89b0e 100644
--- a/configs/stm3240g-eval/discover/Make.defs
+++ b/configs/stm3240g-eval/discover/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/nettest/Make.defs b/configs/stm3240g-eval/nettest/Make.defs
index a7e4f9e077a..b03eb2a3d4a 100644
--- a/configs/stm3240g-eval/nettest/Make.defs
+++ b/configs/stm3240g-eval/nettest/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/nsh/Make.defs b/configs/stm3240g-eval/nsh/Make.defs
index d63876e7542..a1587e4828a 100644
--- a/configs/stm3240g-eval/nsh/Make.defs
+++ b/configs/stm3240g-eval/nsh/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/nsh2/Make.defs b/configs/stm3240g-eval/nsh2/Make.defs
index 16fef334476..9a2f75e73d4 100644
--- a/configs/stm3240g-eval/nsh2/Make.defs
+++ b/configs/stm3240g-eval/nsh2/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/nxconsole/Make.defs b/configs/stm3240g-eval/nxconsole/Make.defs
index 20fabfc9d29..c822180f566 100644
--- a/configs/stm3240g-eval/nxconsole/Make.defs
+++ b/configs/stm3240g-eval/nxconsole/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/nxwm/Make.defs b/configs/stm3240g-eval/nxwm/Make.defs
index bf2da32464c..edb007bd611 100644
--- a/configs/stm3240g-eval/nxwm/Make.defs
+++ b/configs/stm3240g-eval/nxwm/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/ostest/Make.defs b/configs/stm3240g-eval/ostest/Make.defs
index c984a7e85c5..19c1c22640e 100644
--- a/configs/stm3240g-eval/ostest/Make.defs
+++ b/configs/stm3240g-eval/ostest/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/telnetd/Make.defs b/configs/stm3240g-eval/telnetd/Make.defs
index 498ee33861b..325d0fd97e6 100644
--- a/configs/stm3240g-eval/telnetd/Make.defs
+++ b/configs/stm3240g-eval/telnetd/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/webserver/Make.defs b/configs/stm3240g-eval/webserver/Make.defs
index fb47d40050f..d303a06fb00 100644
--- a/configs/stm3240g-eval/webserver/Make.defs
+++ b/configs/stm3240g-eval/webserver/Make.defs
@@ -131,7 +131,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm3240g-eval/xmlrpc/Make.defs b/configs/stm3240g-eval/xmlrpc/Make.defs
index 8f7fe96dc13..09e4b985b71 100644
--- a/configs/stm3240g-eval/xmlrpc/Make.defs
+++ b/configs/stm3240g-eval/xmlrpc/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm32f100rc_generic/nsh/Make.defs b/configs/stm32f100rc_generic/nsh/Make.defs
index 7d016a674e0..76ab1751f83 100644
--- a/configs/stm32f100rc_generic/nsh/Make.defs
+++ b/configs/stm32f100rc_generic/nsh/Make.defs
@@ -105,7 +105,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm32f100rc_generic/ostest/Make.defs b/configs/stm32f100rc_generic/ostest/Make.defs
index 68d5410b340..2742e18cdf6 100644
--- a/configs/stm32f100rc_generic/ostest/Make.defs
+++ b/configs/stm32f100rc_generic/ostest/Make.defs
@@ -105,7 +105,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm32f4discovery/cxxtest/Make.defs b/configs/stm32f4discovery/cxxtest/Make.defs
index 004643950b2..57254cc4af8 100644
--- a/configs/stm32f4discovery/cxxtest/Make.defs
+++ b/configs/stm32f4discovery/cxxtest/Make.defs
@@ -138,7 +138,7 @@ else
   ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm32f4discovery/elf/Make.defs b/configs/stm32f4discovery/elf/Make.defs
index 035a03e71ae..e65571c68a8 100644
--- a/configs/stm32f4discovery/elf/Make.defs
+++ b/configs/stm32f4discovery/elf/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm32f4discovery/nsh/Make.defs b/configs/stm32f4discovery/nsh/Make.defs
index ed1662af5d4..b3ccbbcc185 100644
--- a/configs/stm32f4discovery/nsh/Make.defs
+++ b/configs/stm32f4discovery/nsh/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm32f4discovery/nxlines/Make.defs b/configs/stm32f4discovery/nxlines/Make.defs
index cfdb79a74a0..b3d9337791d 100644
--- a/configs/stm32f4discovery/nxlines/Make.defs
+++ b/configs/stm32f4discovery/nxlines/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm32f4discovery/ostest/Make.defs b/configs/stm32f4discovery/ostest/Make.defs
index 3106143d6cb..4527a9b2230 100644
--- a/configs/stm32f4discovery/ostest/Make.defs
+++ b/configs/stm32f4discovery/ostest/Make.defs
@@ -128,7 +128,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm32f4discovery/pm/Make.defs b/configs/stm32f4discovery/pm/Make.defs
index 3643548d472..e7276aa2ff9 100644
--- a/configs/stm32f4discovery/pm/Make.defs
+++ b/configs/stm32f4discovery/pm/Make.defs
@@ -132,7 +132,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/stm32f4discovery/winbuild/Make.defs b/configs/stm32f4discovery/winbuild/Make.defs
index 6110b7bbd24..2d9e4f1e2a4 100644
--- a/configs/stm32f4discovery/winbuild/Make.defs
+++ b/configs/stm32f4discovery/winbuild/Make.defs
@@ -97,7 +97,7 @@ OBJDUMP = $(CROSSDEV)objdump.exe
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/sure-pic32mx/nsh/Make.defs b/configs/sure-pic32mx/nsh/Make.defs
index debf622d28a..4aaf906ed8e 100644
--- a/configs/sure-pic32mx/nsh/Make.defs
+++ b/configs/sure-pic32mx/nsh/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/sure-pic32mx/ostest/Make.defs b/configs/sure-pic32mx/ostest/Make.defs
index 0c8d4346a58..cc25177391e 100644
--- a/configs/sure-pic32mx/ostest/Make.defs
+++ b/configs/sure-pic32mx/ostest/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/sure-pic32mx/usbnsh/Make.defs b/configs/sure-pic32mx/usbnsh/Make.defs
index fa8d3700faa..fbb58949ba6 100644
--- a/configs/sure-pic32mx/usbnsh/Make.defs
+++ b/configs/sure-pic32mx/usbnsh/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/teensy/hello/Make.defs b/configs/teensy/hello/Make.defs
index b79a52ed91a..9c7cb8268fe 100644
--- a/configs/teensy/hello/Make.defs
+++ b/configs/teensy/hello/Make.defs
@@ -88,7 +88,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/teensy/nsh/Make.defs b/configs/teensy/nsh/Make.defs
index 65838649cb1..63c9db51f25 100644
--- a/configs/teensy/nsh/Make.defs
+++ b/configs/teensy/nsh/Make.defs
@@ -88,7 +88,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/teensy/usbstorage/Make.defs b/configs/teensy/usbstorage/Make.defs
index fa2997fb066..6474a772e16 100644
--- a/configs/teensy/usbstorage/Make.defs
+++ b/configs/teensy/usbstorage/Make.defs
@@ -88,7 +88,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/twr-k60n512/nsh/Make.defs b/configs/twr-k60n512/nsh/Make.defs
index a558cc01093..bb4a3f941c3 100644
--- a/configs/twr-k60n512/nsh/Make.defs
+++ b/configs/twr-k60n512/nsh/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/twr-k60n512/ostest/Make.defs b/configs/twr-k60n512/ostest/Make.defs
index 6d494552153..cb7d962baae 100644
--- a/configs/twr-k60n512/ostest/Make.defs
+++ b/configs/twr-k60n512/ostest/Make.defs
@@ -96,7 +96,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ubw32/nsh/Make.defs b/configs/ubw32/nsh/Make.defs
index 07a966446f8..0f034825a99 100644
--- a/configs/ubw32/nsh/Make.defs
+++ b/configs/ubw32/nsh/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/ubw32/ostest/Make.defs b/configs/ubw32/ostest/Make.defs
index 4f2971768d8..143ab7b9c9f 100644
--- a/configs/ubw32/ostest/Make.defs
+++ b/configs/ubw32/ostest/Make.defs
@@ -98,7 +98,7 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/us7032evb1/nsh/Make.defs b/configs/us7032evb1/nsh/Make.defs
index 9cbc41f5b91..fcda184774b 100644
--- a/configs/us7032evb1/nsh/Make.defs
+++ b/configs/us7032evb1/nsh/Make.defs
@@ -36,7 +36,7 @@
 include ${TOPDIR}/.config
 include ${TOPDIR}/tools/Config.mk
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -68,7 +68,7 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
diff --git a/configs/us7032evb1/ostest/Make.defs b/configs/us7032evb1/ostest/Make.defs
index 32f45eddab8..379342a5d24 100644
--- a/configs/us7032evb1/ostest/Make.defs
+++ b/configs/us7032evb1/ostest/Make.defs
@@ -36,7 +36,7 @@
 include ${TOPDIR}/.config
 include ${TOPDIR}/tools/Config.mk
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -g
 else
   ARCHOPTIMIZATION	= -Os -fno-strict-aliasing -fno-strength-reduce \
@@ -68,7 +68,7 @@ OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   LDFLAGS		+= -g
 endif
 
diff --git a/configs/vsn/nsh/Make.defs b/configs/vsn/nsh/Make.defs
index c6ab376dec2..98ef2d94c45 100644
--- a/configs/vsn/nsh/Make.defs
+++ b/configs/vsn/nsh/Make.defs
@@ -108,7 +108,7 @@ OBJDUMP = $(CROSSDEV)objdump
 ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
 ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION = -g
 else
   ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
diff --git a/configs/z16f2800100zcog/ostest/Make.defs b/configs/z16f2800100zcog/ostest/Make.defs
index 8589b5566a2..e6b5ab4c69a 100644
--- a/configs/z16f2800100zcog/ostest/Make.defs
+++ b/configs/z16f2800100zcog/ostest/Make.defs
@@ -73,7 +73,7 @@ EZDSZILOGINCDIR 	:= ${shell echo "$(WZDSZILOGINCDIR)" | sed -e "s/ /%20/g"}
 
 # Assembler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug
 else
   ARCHASMOPTIMIZATION	= -nodebug
@@ -89,7 +89,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -NOregvar -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -regvar
diff --git a/configs/z16f2800100zcog/pashello/Make.defs b/configs/z16f2800100zcog/pashello/Make.defs
index 3620ffcbe75..e06d1dc0bf7 100644
--- a/configs/z16f2800100zcog/pashello/Make.defs
+++ b/configs/z16f2800100zcog/pashello/Make.defs
@@ -73,7 +73,7 @@ EZDSZILOGINCDIR 	:= ${shell echo "$(WZDSZILOGINCDIR)" | sed -e "s/ /%20/g"}
 
 # Assembler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug
 else
   ARCHASMOPTIMIZATION	= -nodebug
@@ -89,7 +89,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -NOregvar -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -regvar
diff --git a/configs/z8encore000zco/ostest/Make.defs b/configs/z8encore000zco/ostest/Make.defs
index 9e89220f8cc..3991f68675e 100644
--- a/configs/z8encore000zco/ostest/Make.defs
+++ b/configs/z8encore000zco/ostest/Make.defs
@@ -106,7 +106,7 @@ ARCHCPUDEF		= _Z8F6403
 endif
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug -sdiopt
 else
   ARCHASMOPTIMIZATION	= -nodebug -sdiopt
@@ -123,7 +123,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -NOregvar -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -regvar
diff --git a/configs/z8f64200100kit/ostest/Make.defs b/configs/z8f64200100kit/ostest/Make.defs
index 899f3955c7a..5987934c3c2 100644
--- a/configs/z8f64200100kit/ostest/Make.defs
+++ b/configs/z8f64200100kit/ostest/Make.defs
@@ -106,7 +106,7 @@ ARCHCPUDEF		= _Z8F6403
 endif
 endif
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHASMOPTIMIZATION	= -debug -sdiopt
 else
   ARCHASMOPTIMIZATION	= -nodebug -sdiopt
@@ -123,7 +123,7 @@ AFLAGS			= $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMLIST) \
 
 # Compiler definitions
 
-ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
   ARCHOPTIMIZATION	= -debug -NOregvar -reduceopt
 else
   ARCHOPTIMIZATION	= -nodebug -regvar