diff options
| author | Peng Fan <van.freenix@gmail.com> | 2016-01-30 12:10:49 +0800 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2016-01-31 16:32:56 +0100 |
| commit | 397d7d5a1be16208d82ad3997bd3068a6f529b6f (patch) | |
| tree | 972d6b5d4251ffa3cf8a235e53d57c341828b790 /arch | |
| parent | c5e954eccd473c1601d60d144bc18f90893cb3ac (diff) | |
| download | blackbird-obmc-uboot-397d7d5a1be16208d82ad3997bd3068a6f529b6f.tar.gz blackbird-obmc-uboot-397d7d5a1be16208d82ad3997bd3068a6f529b6f.zip | |
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 <peng.fan@nxp.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Reviewed-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/config.mk | 1 |
1 files changed, 1 insertions, 0 deletions
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. |
