Garbage collect code that isn't used.

Saves a good few kbytes.

Signed-off-by: Charles Manning cdhmanning@gmail.com --- Makefile | 2 +- arch/arm/config.mk | 6 ++++++ arch/arm/cpu/armv7/u-boot.lds | 6 +++--- 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile index 713dba1..1ba3e3a 100644 --- a/Makefile +++ b/Makefile @@ -368,7 +368,7 @@ $(obj)u-boot.dis: $(obj)u-boot GEN_UBOOT = \ UNDEF_SYM=`$(OBJDUMP) -x $(LIBBOARD) $(LIBS) | \ sed -n -e 's/.*($(SYM_PREFIX)__u_boot_cmd_.*)/-u\1/p'|sort|uniq`;\ - cd $(LNDIR) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $$UNDEF_SYM $(__OBJS) \ + cd $(LNDIR) && $(LD) $(LDFLAGS) $(LDFLAGSFINAL) $(LDFLAGS_$(@F)) $$UNDEF_SYM $(__OBJS) \ --start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \ -Map u-boot.map -o u-boot $(obj)u-boot: depend \ diff --git a/arch/arm/config.mk b/arch/arm/config.mk index fcc26a2..02cc9b2 100644 --- a/arch/arm/config.mk +++ b/arch/arm/config.mk @@ -67,3 +67,9 @@ LDSCRIPT := $(SRCTREE)/$(CPUDIR)/u-boot.lds ifndef CONFIG_NAND_SPL LDFLAGS_u-boot += -pie endif + +# Dead code stripping +CFLAGS += -ffunction-sections +CFLAGS += -fdata-sections +LDFLAGS += --cref +LDFLAGSFINAL += --cref --gc-sections diff --git a/arch/arm/cpu/armv7/u-boot.lds b/arch/arm/cpu/armv7/u-boot.lds index dbae54d..f1267b5 100644 --- a/arch/arm/cpu/armv7/u-boot.lds +++ b/arch/arm/cpu/armv7/u-boot.lds @@ -34,8 +34,8 @@ SECTIONS . = ALIGN(4); .text : { - arch/arm/cpu/armv7/start.o (.text) - *(.text) + KEEP(arch/arm/cpu/armv7/start.o (.text*)) + *(.text*) }

. = ALIGN(4); @@ -70,7 +70,7 @@ SECTIONS

.bss __rel_dyn_start (OVERLAY) : { __bss_start = .; - *(.bss) + *(.bss*) . = ALIGN(4); __bss_end__ = .; }