Added debug info to all tools

All tools for debug info uses `-O0 -g3 -fvar-tracking-assignments`
GLibC building process uses -Og instead of -O0 otherwise it will
not compile

Makefile.in

@@ -36,6 +36,8 @@ SHELL := /bin/sh
 AWK := @GAWK@
 SED := @GSED@
 PATH := $(INSTALL_DIR)/bin:$(PATH)
+DEBUG_INFO := @debug_info@
+DEBUG_INFO_GLIBC := @debug_info_glibc@
 
 # Check to see if we need wrapper scripts for awk/sed (which point to
 # gawk/gsed on platforms where these aren't the default), otherwise
@@ -232,7 +234,12 @@ stamps/build-binutils-linux: $(BINUTILS_SRCDIR) stamps/check-write-permission
 		--disable-nls \
 		$(BINUTILS_TARGET_FLAGS) \
 		--disable-sim \
-		CFLAGS="-g3"
+		CFLAGS="$(CFLAGS) $(DEBUG_INFO)" \
+		CFLAGS_FOR_TARGET="$(CFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CFLAGS_FOR_BUILD="$(CFLAGS_FOR_BUILD) $(DEBUG_INFO)" \
+		CXXFLAGS="$(CXXFLAGS) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_TARGET="$(CXXFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_BUILD="$(CXXFLAGS_FOR_BUILD) $(DEBUG_INFO)"
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
 	mkdir -p $(dir $@) && touch $@
@@ -260,9 +267,6 @@ stamps/build-glibc-linux: $(GLIBC_SRCDIR) stamps/build-gcc-linux-stage1
 	cd $(notdir $@) && \
 		CC="$(GLIBC_CC_FOR_TARGET) $($@_CFLAGS)" \
 		CXX="$(GLIBC_CXX_FOR_TARGET) $($@_CFLAGS)" \
-		CFLAGS="$(CFLAGS_FOR_TARGET) @debug_flag@ -O2 $($@_CFLAGS)" \
-		CXXFLAGS="$(CXXFLAGS_FOR_TARGET) @debug_flag@ -O2 $($@_CFLAGS)" \
-		ASFLAGS="$(ASFLAGS_FOR_TARGET) $($@_CFLAGS)" \
 		$</configure \
 		--host=${LINUX_TUPLE} \
 		--prefix=/usr \
@@ -273,7 +277,13 @@ stamps/build-glibc-linux: $(GLIBC_SRCDIR) stamps/build-gcc-linux-stage1
 		$(MULTILIB_FLAGS) \
 		$(GLIBC_TARGET_FLAGS) \
 		$($@_LIBDIROPTS) \
-		CFLAGS="-O2 @debug_flag3@"
+		ASFLAGS="$(ASFLAGS_FOR_TARGET) $($@_CFLAGS)" \
+		CFLAGS="$(CFLAGS) -O2 $(DEBUG_INFO_GLIBC) $($@_CFLAGS) " \
+		CFLAGS_FOR_TARGET="$(CFLAGS_FOR_TARGET) $(DEBUG_INFO_GLIBC)" \
+		CFLAGS_FOR_BUILD="$(CFLAGS_FOR_BUILD) $(DEBUG_INFO_GLIBC)" \
+		CXXFLAGS="$(CXXFLAGS) -O2 $(DEBUG_INFO_GLIBC) $($@_CFLAGS)" \
+		CXXFLAGS_FOR_TARGET="$(CXXFLAGS_FOR_TARGET) $(DEBUG_INFO_GLIBC)" \
+		CXXFLAGS_FOR_BUILD="$(CXXFLAGS_FOR_BUILD) $(DEBUG_INFO_GLIBC)"
 	$(MAKE) -C $(notdir $@)
 	+flock $(SYSROOT)/.lock $(MAKE) -C $(notdir $@) install install_root=$(SYSROOT)
 	mkdir -p $(dir $@) && touch $@
@@ -307,10 +317,14 @@ stamps/build-gcc-linux-stage1: $(GCC_SRCDIR) stamps/build-binutils-linux \
 		@with_fpu@ \
 		$(GCC_CHECKING_FLAGS) \
 		$(MULTILIB_FLAGS) \
+		--with-gnu-as \
+		--with-gnu-ld \
+		CFLAGS="$(CFLAGS)" \
 		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
+		CFLAGS_FOR_BUILD="$(CFLAGS_FOR_BUILD)" \
+		CXXFLAGS="$(CXXFLAGS)" \
 		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)" \
-		--with-gnu-as \
-		--with-gnu-ld
+		CXXFLAGS_FOR_BUILD="$(CXXFLAGS_FOR_BUILD)"
 	$(MAKE) -C $(notdir $@) inhibit-libc=true all-gcc
 	$(MAKE) -C $(notdir $@) inhibit-libc=true install-gcc
 	$(MAKE) -C $(notdir $@) inhibit-libc=true all-target-libgcc
@@ -340,10 +354,14 @@ stamps/build-gcc-linux-stage2: $(GCC_SRCDIR) stamps/build-glibc-linux \
 		@with_fpu@ \
 		$(GCC_CHECKING_FLAGS) \
 		$(MULTILIB_FLAGS) \
-		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
-		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)" \
 		--with-gnu-as \
-		--with-gnu-ld
+		--with-gnu-ld \
+		CFLAGS="$(CFLAGS) $(DEBUG_INFO)" \
+		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CFLAGS_FOR_BUILD="$(CFLAGS_FOR_BUILD) $(DEBUG_INFO)" \
+		CXXFLAGS="$(CXXFLAGS) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_BUILD="$(CXXFLAGS_FOR_BUILD) $(DEBUG_INFO)"
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
 	cp -a $(INSTALL_DIR)/$(LINUX_TUPLE)/lib* $(SYSROOT)
@@ -356,8 +374,12 @@ stamps/build-gdbserver-linux: $(BINUTILS_SRCDIR) stamps/build-gcc-linux-stage2
 		--host=$(LINUX_TUPLE)                        \
 		--prefix=/usr                                \
 		--disable-gdb                                \
-		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
-		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)"
+		CFLAGS="$(CFLAGS) $(DEBUG_INFO)" \
+		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CFLAGS_FOR_BUILD="$(CFLAGS_FOR_BUILD) $(DEBUG_INFO)" \
+		CXXFLAGS="$(CXXFLAGS) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_BUILD="$(CXXFLAGS_FOR_BUILD) $(DEBUG_INFO)"
 	$(MAKE) -C $(notdir $@) all-gdbserver
 	$(MAKE) -C $(notdir $@) install-gdbserver DESTDIR=$(SYSROOT)
 	mkdir -p $(dir $@) && touch $@
@@ -389,8 +411,13 @@ stamps/build-binutils-newlib: $(BINUTILS_SRCDIR)
 		--disable-python \
 		@multilib_flags@ \
 		@werror_flag@ \
-		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
-		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)"
+		CFLAGS="$(CFLAGS) $(DEBUG_INFO)" \
+		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CFLAGS_FOR_BUILD="$(CFLAGS_FOR_BUILD) $(DEBUG_INFO)" \
+		CXXFLAGS="$(CXXFLAGS) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_BUILD="$(CXXFLAGS_FOR_BUILD) $(DEBUG_INFO)"
+
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
 	mkdir -p $(dir $@) && touch $@
@@ -420,8 +447,12 @@ stamps/build-gcc-newlib-stage1: $(GCC_SRCDIR) stamps/build-binutils-newlib
 		@with_fpu@ \
 		--with-gnu-as \
 		--with-gnu-ld \
+		CFLAGS="$(CFLAGS)" \
 		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
-		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)"
+		CFLAGS_FOR_BUILD="$(CFLAGS_FOR_BUILD)" \
+		CXXFLAGS="$(CXXFLAGS)" \
+		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)" \
+		CXXFLAGS_FOR_BUILD="$(CXXFLAGS_FOR_BUILD)"
 	$(MAKE) -C $(notdir $@) all-gcc
 	$(MAKE) -C $(notdir $@) install-gcc
 	mkdir -p $(dir $@) && touch $@
@@ -435,8 +466,13 @@ stamps/build-newlib: $(NEWLIB_SRCDIR) stamps/build-gcc-newlib-stage1
 		@configure_host@ \
 		@multilib_flags@ \
 		--prefix=$(INSTALL_DIR) \
-		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
-		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)"
+		CFLAGS="$(CFLAGS) $(DEBUG_INFO)" \
+		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CFLAGS_FOR_BUILD="$(CFLAGS_FOR_BUILD) $(DEBUG_INFO)" \
+		CXXFLAGS="$(CXXFLAGS) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_BUILD="$(CXXFLAGS_FOR_BUILD) $(DEBUG_INFO)"
+
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
 	mkdir -p $(dir $@) && touch $@
@@ -467,8 +503,12 @@ stamps/build-gcc-newlib-stage2: $(GCC_SRCDIR) stamps/build-newlib
 		@with_fpu@ \
 		--with-gnu-as \
 		--with-gnu-ld \
-		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
-		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)"
+		CFLAGS="$(CFLAGS) $(DEBUG_INFO)" \
+		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CFLAGS_FOR_BUILD="$(CFLAGS_FOR_BUILD) $(DEBUG_INFO)" \
+		CXXFLAGS="$(CXXFLAGS) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET) $(DEBUG_INFO)" \
+		CXXFLAGS_FOR_BUILD="$(CXXFLAGS_FOR_BUILD) $(DEBUG_INFO)"
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
 	mkdir -p $(dir $@) && touch $@

configure.ac

@@ -84,15 +84,16 @@ AS_IF([test "x$enable_werror" != xno],
 	[AC_SUBST(werror_flag, --enable-werror)],
 	[AC_SUBST(werror_flag, --disable-werror)])
 
-AC_ARG_ENABLE(debug,
-        [AS_HELP_STRING([--enable-debug],
-		[enable building with debug info @<:@--disable-debug@:>@])],
+AC_ARG_ENABLE(debug_info,
+        [AS_HELP_STRING([--enable-debug-info],
+		[disable building with debug info @<:@--disable-debug@:>@])],
         [],
-        [enable_debug=yes]
+        [enable_debug_info=yes]
         )
 
-AS_IF([test "x$enable_debug" != xno],
-	[AC_SUBST(debug_flag, -g) AC_SUBST(debug_flag3, -g3)])
+AS_IF([test "x$enable_debug_info" != xno],
+	[AC_SUBST(debug_info_glibc, "-Og -g3 -fvar-tracking-assignments") 
+	AC_SUBST(debug_info, "-O0 -g3 -fvar-tracking-assignments")])
 
 AC_ARG_WITH(cpu,
 	[AS_HELP_STRING([--with-cpu=CPU],