Can anyone make sense of the build error for SLEPc 3.8.2 on i386? The log is at https://buildd.debian.org/status/package.php?p=slepc&suite=experimental
i.e. https://buildd.debian.org/status/fetch.php?pkg=slepc&arch=i386&ver=3.8.2%2Bdfsg1-1exp1&stamp=1519726001&raw=0 A relevant snippet is CXX installed-i386-linux-gnu-real/obj/src/sys/classes/fn/impls/fnutil.o In file included from /usr/lib/petscdir/petsc3.8/i386-linux-gnu-real/include/petscsys.h:1960:0, from /usr/lib/petscdir/petsc3.8/i386-linux-gnu-real/include/petscis.h:7, from /usr/lib/petscdir/petsc3.8/i386-linux-gnu-real/include/petscvec.h:9, from /usr/lib/petscdir/petsc3.8/i386-linux-gnu-real/include/petscmat.h:6, from /<<BUILDDIR>>/slepc-3.8.2+dfsg1/include/slepcsys.h:34, from /<<BUILDDIR>>/slepc-3.8.2+dfsg1/include/slepcfn.h:16, from /<<BUILDDIR>>/slepc-3.8.2+dfsg1/include/slepc/private/fnimpl.h:14, from /<<BUILDDIR>>/slepc-3.8.2+dfsg1/src/sys/classes/fn/impls/fnutil.c:14: /usr/lib/gcc/i686-linux-gnu/7/include/xmmintrin.h: In function 'PetscErrorCode SlepcSetFlushToZero(unsigned int*)': /usr/lib/gcc/i686-linux-gnu/7/include/xmmintrin.h:878:1: error: inlining failed in call to always_inline 'void _MM_SET_FLUSH_ZERO_MODE(unsigned int)': target specific option mismatch _MM_SET_FLUSH_ZERO_MODE (unsigned int __mode) ... /<<BUILDDIR>>/slepc-3.8.2+dfsg1/include/slepcmath.h:98:26: note: called from here _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON); ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ It seems to be saying there is something wrong in the way that _MM_SET_FLUSH_ZERO_MODE from xmmintrin.h is being used on i386. It's called by SlepcSetFlushToZero( ), a new function in slepc 3.8, at slepc/include/slepcmath.h at l.98: /* SlepcSetFlushToZero - Set the FTZ flag in floating-point arithmetic. */ PETSC_STATIC_INLINE PetscErrorCode SlepcSetFlushToZero(unsigned int *state) { PetscFunctionBegin; #if defined(PETSC_HAVE_XMMINTRIN_H) #if defined(_MM_FLUSH_ZERO_ON) *state = _MM_GET_FLUSH_ZERO_MODE(); _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON); #else *state = 0; #endif #endif PetscFunctionReturn(0); } xmmintrin.h is provided by libgcc-7-dev. Does it mean i386 doesn't actually support FTZ (or _MM_FLUSH_ZERO_ON), or does gcc need some C99 flags specified on i386 (or a bug fix)? slepc 3.8 builds fine on all other arches. It's in debian experimental, or https://salsa.debian.org/science-team/slepc Drew
