From 397d7d5a1be16208d82ad3997bd3068a6f529b6f Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Sat, 30 Jan 2016 12:10:49 +0800 Subject: [PATCH] arm: config: enforce -fno-pic for gcc Android's tool chain enable the -mandroid at default. This option will enable the -fpic, which cause uboot compilation failure: " LD u-boot u-boot contains unexpected relocations: R_ARM_ABS32 R_ARM_RELATIVE " In my testcase, arm-linux-androideabi-gcc-4.9 internally enables '-fpic', so when compiling code, there will be relocation entries using type R_ARM_GOT_BREL and .got section. When linking all the built-in.o using ld, there will be R_ARM_ABS32 relocation entry and .got section in the final u-boot elf image. This can not be handled by u-boot, since u-boot only expects R_ARM_RELATIVE relocation entry. arm-poky-linux-gnueabi-gcc-4.9 default does not enable '-fpic', so there is not .got section and R_ARM_GOT_BREL in built-in.o. And in the final u-boot elf image, all relocation entries are R_ARM_RELATIVE. we can pass '-fno-pic' to xxx-gcc to disable pic. whether the toolchain internally enables or disables pic, '-fno-pic' can work well. Signed-off-by: Peng Fan Cc: Albert Aribaud Reviewed-by: Tom Rini --- arch/arm/config.mk | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/config.mk b/arch/arm/config.mk index a3e14a862b..8fa57ecfd8 100644 --- a/arch/arm/config.mk +++ b/arch/arm/config.mk @@ -107,6 +107,7 @@ ALL-y += checkarmreloc # instruction. Relocation is not supported for that case, so disable # such usage by requiring word relocations. PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) +PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic) endif # limit ourselves to the sections we want in the .bin. -- 2.39.5