On Thu, Nov 1, 2018 at 8:37 PM Joel Stanley <j...@jms.id.au> wrote: > > 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)
^^^ Hi Joel, would you mind recompiling with `-fmacro-backtrace-limit=0` hacked in and including the full backtrace? I'm curious if there's a more appropriate fix, but can't tell where the inline asm is that clang is complaining about. > ./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 > -- Thanks, ~Nick Desaulniers