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| author |   Paul Burton <paul.burton@mips.com> | 2018-08-07 16:06:41 -0700 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2018-08-07 16:16:08 -0700 |
| commit | c6d6f4c55f5cda5a7fa5a08eede0eb289937c328 (patch) | |
| tree | 1d98da834a50213a3572f599c2c49fbff62311ed /arch/mips | |
| parent | MIPS: Use dins to simplify __write_64bit_c0_split() (diff) | |
| download | linux-dev-c6d6f4c55f5cda5a7fa5a08eede0eb289937c328.tar.xz linux-dev-c6d6f4c55f5cda5a7fa5a08eede0eb289937c328.zip | |
MIPS: Always specify -EB or -EL when using clang
When building using clang, always specify -EB or -EL in order to ensure
we target the desired endianness.
Since clang cross compiles using a single compiler build with multiple
targets, our -dumpmachine tests which don't specify clang's --target
argument check output based upon the build machine rather than the
machine our build will target. This means our detection of whether to
specify -EB fails miserably & we never do. Providing the endianness flag
unconditionally for clang resolves this issue & simplifies the clang
path somewhat.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Makefile | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/mips/Makefile b/arch/mips/Makefile index 1e98d22ec119..5425df002a6b 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -122,12 +122,22 @@ cflags-y += -ffreestanding # are used, so we kludge that here. A bug has been filed at # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413. # +# clang doesn't suffer from these issues and our checks against -dumpmachine +# don't work so well when cross compiling, since without providing --target +# clang's output will be based upon the build machine. So for clang we simply +# unconditionally specify -EB or -EL as appropriate. +# +ifeq ($(cc-name),clang) +cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB +cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL +else undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__ undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__ predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__ predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__ cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be)) cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le)) +endif cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \ -fno-omit-frame-pointer |