On 2/2/2018 12:04 PM, wm4 wrote: > On Fri, 2 Feb 2018 21:50:00 +0800 (CST) > qw <applema...@163.com> wrote: > >> Hi, >> >> >> I use the following command to build ffmpeg: >> >> >> ./configure --cc=/opt/intel/bin/icc --enable-version3 --enable-asm >> --enable-avfilter --disable-static --enable-shared --enable-gpl >> --enable-nonfree --prefix=/usr/local/ --extra-cflags='-I/usr/local/include >> --extra-ldflags='-L/usr/local/lib --enable-stripping >> make >> >> >> But I fail to compile ffmpeg, and error message is shown as below: >> >> >> icc: command line warning #10121: overriding '-std=gnu99' with '-std=c99' >> libavutil/cpu.c(48): error: identifier "ATOMIC_VAR_INIT" is undefined >> static atomic_int cpu_flags = ATOMIC_VAR_INIT(-1); >> ^ > > Maybe we need to force c11? Could you try to add -std=c11 or -std=gnu11 > to CFLAGS?
That's already done in configure, and either a compat or a dummy stdatomic header is added if the compiler doesn't fully support c11 atomics. There's no way for ATOMIC_VAR_INIT to be undefined. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
