Generate a linking error if perror() is used in libav*

Originally committed as revision 11061 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavutil/internal.h b/libavutil/internal.h
index 2ed5719..16f13c4 100644 (file)
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -257,6 +257,8 @@ if((y)<(x)){\
 #define printf please_use_av_log
 #undef  fprintf
 #define fprintf please_use_av_log
+#undef  perror
+#define perror please_use_av_log_instead_of_perror
 #endif
 
 #define CHECKED_ALLOCZ(p, size)\