On Mon, Mar 21, 2016 at 9:19 AM, qw <applema...@163.com> wrote: > Hi, > > I want to build ffmpeg without optimization options, which means compiling > flags uses O0 instead of O1-O3. I use the following command to build ffmpeg, > where O1 is used in config.mak. > > ./configure --enable-debug --disable-optimizations ...... > I want to disable all optimization options to debug ffmpeg/ffmpeg_g program. > If I change optimization options in config.mak, i.e. using O0 instead of O1, > there will be some error messages during the building process: > > libavutil/libavutil.a(cpu.o): In function `av_get_cpu_flags': > /export/qiang/sourceCode/ffmpeg-2.8.3/libavutil/cpu.c:82: undefined > reference to `ff_get_cpu_flags_aarch64' > /export/qiang/sourceCode/ffmpeg-2.8.3/libavutil/cpu.c:84: undefined > reference to `ff_get_cpu_flags_arm' > /export/qiang/sourceCode/ffmpeg-2.8.3/libavutil/cpu.c:86: undefined > reference to `ff_get_cpu_flags_ppc' > How to build ffmpeg with O0 option?
Building without optimizations is not supported. - Hendrik _______________________________________________ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user