98dc25672f
This fixes the following warning with GCC:
libavcodec/pthread.c:35:0: warning: _GNU_SOURCE redefined [enabled by default]
<command-line>::0: note: this is the location of the previous definition
The reason of the presence of this flag is:
% pkg-config --cflags sdl
-D_GNU_SOURCE=1 -D_REENTRANT -I/usr/include/SDL
FFmpeg README ------------- 1) Documentation ---------------- * Read the documentation in the doc/ directory in git. You can also view it online at http://ffmpeg.org/documentation.html 2) Licensing ------------ * See the LICENSE file. 3) Build and Install -------------------- * See the INSTALL file.