Merge pull request #338 from brucehoult/newlib_use_function_sections

Enable function and data sections for newlib.

Author: kito-cheng

Makefile.in

@@ -571,8 +571,8 @@ stamps/build-newlib: $(NEWLIB_SRCDIR) $(NEWLIB_SRC_GIT) stamps/build-gcc-newlib-
 		--enable-newlib-io-long-long \
 		--enable-newlib-io-c99-formats \
 		--enable-newlib-register-fini \
-		CFLAGS_FOR_TARGET="-O2 -D_POSIX_MODE $(CFLAGS_FOR_TARGET)" \
-		CXXFLAGS_FOR_TARGET="-O2 -D_POSIX_MODE $(CXXFLAGS_FOR_TARGET)"
+		CFLAGS_FOR_TARGET="-O2 -D_POSIX_MODE -ffunction-sections -fdata-sections $(CFLAGS_FOR_TARGET)" \
+		CXXFLAGS_FOR_TARGET="-O2 -D_POSIX_MODE -ffunction-sections -fdata-sections $(CXXFLAGS_FOR_TARGET)"
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
 	mkdir -p $(dir $@) && touch $@