On Mon, Mar 21, 2016 at 08:37:25PM +0800, qw 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?
what compiler are you using ? [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB I am the wisest man alive, for I know one thing, and that is that I know nothing. -- Socrates
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