When SSE2 or higher compiler optimizations are used, mingw uses the _mm_mfence intrinsic for MemoryBarrier, however it doesn't include the appropriate headers automatically. --- compat/w32pthreads.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/compat/w32pthreads.h b/compat/w32pthreads.h index 2aff72a..6b602c5 100644 --- a/compat/w32pthreads.h +++ b/compat/w32pthreads.h @@ -39,6 +39,11 @@ #include <windows.h> #include <process.h> +/* MinGW requires the intrinsics header for the pthread_once fallback code */ +#if _WIN32_WINNT < 0x0600 && defined(__MINGW32__) +#include <intrin.h> +#endif + #include "libavutil/attributes.h" #include "libavutil/common.h" #include "libavutil/internal.h" -- 2.5.3.windows.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel