build fails on debian oldstable and stable

[shurreg]

Summary of the bug: build process fails on Debian Wheezy and Jessie because the distros have GCC 4.7 and 4.8 respectively, and those versions don't have stdatomic.h bundled. Standalone FFmpeg builds prefectly because its configure script adds path to stdatomic.h bundled in ffmpeg/compat/atomics/gcc, while mplayer's one doesn't.

Quick manual fix was an addition of "CPPFLAGS += -Icompat/atomics/gcc" into ffmpeg/common.mak

It seems CentOSes are affected, too: ​https://codingweb.io/centos-7-stdatomic-h-no-file-directory/

How to reproduce:

% ./configure --disable-runtime-cpudetection
...
% make
CC      libavutil/cpu.o
libavutil/cpu.c:20:23: fatal error: stdatomic.h: No such file or directory
%

[beastd]

Could reproduce on Ubuntu with gcc-4.7

[Yotam Medini]

The quick manual fix to CPPFLAGS - in my case -
was applied to ffmpeg/ffbuild/common.mak

[beastd]

Replying to yotam:

The quick manual fix to CPPFLAGS - in my case -
was applied to ffmpeg/ffbuild/common.mak

Yes, the file moved inside of ffmpeg into the mentioned directory.

NOTE:

BTW if the build isn't working for you today, that is because lot's of stuff that was deprecated for quite some time got disabled in FFmpeg. I am working on it right now and I already have MPlayer compiling again, but it will probably take some time to get it right.

[beastd]

I will close this ticket because

• it's only relevant for old compilers
• a trivial workaround is described in this ticket
• it is non-trivial to fix properly