Define av_alias if supported by compiler

Originally committed as revision 21523 to svn://svn.ffmpeg.org/ffmpeg/trunk

Define av_alias if supported by compiler
Originally committed as revision 21523 to svn://svn.ffmpeg.org/ffmpeg/trunk
788627de · Måns Rullgård · dffb41b9 · 788627de
隐藏空白更改
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Showing with 8 addition and 0 deletion

libavutil/internal.h libavutil/internal.h +8 -0

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--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -55,6 +55,14 @@
 #endif
 #endif

+#ifndef av_alias
+#if HAVE_ATTRIBUTE_MAY_ALIAS
+#   define av_alias __attribute__((may_alias))
+#else
+#   define av_alias
+#endif
+#endif
+
 #ifndef INT16_MIN
 #define INT16_MIN       (-0x7fff - 1)
 #endif