make CC=clang-8 ARCH=powerpc CROSS_COMPILE=powerpc-linux-gnu- ppc44x_defconfig make CC=clang-8 ARCH=powerpc CROSS_COMPILE=powerpc-linux-gnu-
... arch/powerpc/math-emu/fnmsub.c:46:2: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions FP_ADD_D(R, T, B); ^~~~~~~~~~~~~~~~~ ./include/math-emu/double.h:110:27: note: expanded from macro 'FP_ADD_D' #define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y) ^~~~~~~~~~~~~~~~~~ ./include/math-emu/op-common.h:367:34: note: expanded from macro '_FP_ADD' #define _FP_ADD(fs, wc, R, X, Y) _FP_ADD_INTERNAL(fs, wc, R, X, Y, '+') ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ./include/math-emu/op-common.h:264:4: note: expanded from macro '_FP_ADD_INTERNAL' _FP_FRAC_ADD_##wc(R, X, Y); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~ note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) ./include/math-emu/op-2.h:94:27: note: expanded from macro '_FP_FRAC_ADD_2' __FP_FRAC_ADD_2(R##_f1, R##_f0, X##_f1, X##_f0, Y##_f1, Y##_f0) ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Link: https://github.com/ClangBuiltLinux/linux/issues/260 Signed-off-by: Joel Stanley <j...@jms.id.au> --- arch/powerpc/math-emu/Makefile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/powerpc/math-emu/Makefile b/arch/powerpc/math-emu/Makefile index 494df26c5988..b9cb797445ac 100644 --- a/arch/powerpc/math-emu/Makefile +++ b/arch/powerpc/math-emu/Makefile @@ -18,3 +18,7 @@ CFLAGS_fabs.o = -fno-builtin-fabs CFLAGS_math.o = -fno-builtin-fabs ccflags-y = -I. -Iinclude/math-emu -w + +ifdef CONFIG_CC_IS_CLANG +ccflags-y += -fheinous-gnu-extensions +endif -- 2.19.1