On Sat, 3 Nov 2018 at 03:24, Nick Desaulniers <ndesaulni...@google.com> wrote:
>
> 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.
Sure. Here's the full backtrace:
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:274:4: note: expanded from macro
'_FP_ADD_INTERNAL'
_FP_FRAC_SUB_##wc(R, X, Y); \
^~~~~~~~~~~~~~~~~~~~~~~~~~
<scratch space>:268:1: note: expanded from here
_FP_FRAC_SUB_2
^
./include/math-emu/op-2.h:97:19: note: expanded from macro '_FP_FRAC_SUB_2'
__FP_FRAC_SUB_2(R##_f1, R##_f0, X##_f1, X##_f0, Y##_f1, Y##_f0)
~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<scratch space>:269:1: note: expanded from here
R_f1
^
./arch/powerpc/include/asm/sfp-machine.h:283:27: note: expanded from
macro 'sub_ddmmss'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
