Blackfin: enable --gc-sections

Start building all Blackfin boards with -ffunction-sections/-fdata-sections
and linking with --gc-sections.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

blackfin_config.mk

@@ -27,6 +27,9 @@ CONFIG_BFIN_BOOT_MODE := $(strip $(subst ",,$(CONFIG_BFIN_BOOT_MODE)))
 PLATFORM_RELFLAGS += -ffixed-P5 -fomit-frame-pointer
 PLATFORM_CPPFLAGS += -DCONFIG_BLACKFIN
 
+LDFLAGS += --gc-sections
+PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
+
 ifneq (,$(CONFIG_BFIN_CPU))
 PLATFORM_RELFLAGS += -mcpu=$(CONFIG_BFIN_CPU)
 endif

cpu/blackfin/Makefile

@@ -47,6 +47,7 @@ $(obj)bootrom-asm-offsets.h: $(obj)bootrom-asm-offsets.s
 
 # make sure our initcode (which goes into LDR) does not
 # have relocs or external references
+$(obj)initcode.o: CFLAGS += -fno-function-sections -fno-data-sections
 READINIT = env LC_ALL=C $(CROSS_COMPILE)readelf -s $<
 check_initcode: $(obj)initcode.o
 ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS)