The posix_memalign declaration in gcc/i386/config/pmm_malloc.h is decorated with 'throw ()', which occasionally causes declaration conflict errors (some header files, not part of GCC, that declare posix_memalign, do not have the throw decoration). An example of this can be seen at https://github.com/android-ndk/ndk/issues/91. It appears that the 'throw()' decoration comes from glibc header files. Adding ifdefs to check for __GLIBC__ before adding the 'throw()' fixed the github problem mentioned above.
I have tested this patch by bootstrapping and by running test testsuite with no regressions. Is this ok to commit? -- Caroline Tice ctic...@gmail.com gcc/ChangeLog: 2016-10-27 Caroline Tice <cmt...@google.com> * config/i386/pmm_malloc.h (posix_memalign): Add ifdefs to only decorate the declaration with 'throw()' if __GLIBC__ is defined.
Index: gcc/config/i386/pmm_malloc.h =================================================================== --- gcc/config/i386/pmm_malloc.h (revision 241483) +++ gcc/config/i386/pmm_malloc.h (working copy) @@ -31,8 +31,12 @@ #ifndef __cplusplus extern int posix_memalign (void **, size_t, size_t); #else +#ifdef __GLIBC__ extern "C" int posix_memalign (void **, size_t, size_t) throw (); +#else +extern "C" int posix_memalign (void **, size_t, size_t); #endif +#endif static __inline void * _mm_malloc (size_t __size, size_t __alignment)