Erik de Castro Lopo wrote:
No, what is needed is a way to disable SSE at run time even if it has been compiled in at build time.
It's not possible if ALL flac/libFLAC files are built with -msse2 option. So the only solution is to remove -msse2 option from configure.ac. Unfortunately it will disable all intrinsics for GCC 4.8 and older (and afaik for clang): only if a file was compiled with -msse option then sse intrinsics are allowed. -msse2 enables sse and sse2 intrinsics, and so on. The common way is to compile different files with different options. For libFLAC it means that all *_sse.c files should be compiled with -msse switch, all *_sse2.c files should be compiled with -msse2, and so on. But unfortunately it's not supported in the current build system. OTOH, GCC 4.9 (and newer) doesn't require those switches: now it's possible to set supported instruction set on a per-function basis. That's what libFLAC does with FLAC__SSE_TARGET(x) macro. _______________________________________________ flac-dev mailing list flac-dev@xiph.org http://lists.xiph.org/mailman/listinfo/flac-dev
