lavu/intmath.h: Add msvc/icl ctzll optimisations.

[ffmpeg] / libavutil / attributes.h

diff --git a/libavutil/attributes.h b/libavutil/attributes.h
index 50e8eb37b196ca4802ee28a4e3c3771b6da1ed16..5c6b9deecb7b0535b93cb530073986ce04b4b906 100644 (file)
--- a/libavutil/attributes.h
+++ b/libavutil/attributes.h
@@ -52,6 +52,12 @@
 #endif
 #endif
 
+#if AV_GCC_VERSION_AT_LEAST(3,4)
+#    define av_warn_unused_result __attribute__((warn_unused_result))
+#else
+#    define av_warn_unused_result
+#endif
+
 #if AV_GCC_VERSION_AT_LEAST(3,1)
 #    define av_noinline __attribute__((noinline))
 #elif defined(_MSC_VER)