[FFmpeg-user] having an issue with compile.

Richard Butts rbutts1.mobile at gmail.com
Sat Feb 7 23:05:59 CET 2015

Hi there! Thanks in advance for any help you may be able to give me.  I’m trying to get some tools together with the aspiration to build an integration/app in linux (Centos)

I found your excellent script and was working my way through it but hit a snag with opus and x264.


ffmpeg]# ./configure --prefix="$MPEG_S/ffmpeg_build" --extra-cflags="-I $MPEG_S/ffmpeg_build/include" --extra-ldflags="-L $MPEG_S/ffmpeg_build/lib" --bindir="$MPEG_S/bin" --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
ERROR: libx264 not found

If you think configure made a mistake, make sure you are using the latest
version from Git.  If the latest version fails, report the problem to the
ffmpeg-user at ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solve the problem.

ffmpeg]# ls /software/ffmpeg/ffmpeg_build/lib/pkgconfig/
fdk-aac.pc  ogg.pc  opus.pc  vorbisenc.pc  vorbisfile.pc  vorbis.pc  vpx.pc  x264.pc
[root at f4s-qnode-01-1 ffmpeg]# 

ffmpeg]# ls $MPEG_S/ffmpeg_build/lib
libfdk-aac.a  libfdk-aac.la  libmp3lame.a  libmp3lame.la  libogg.a  libogg.la  libopus.a  libopus.la  libvorbis.a  libvorbisenc.a  libvorbisenc.la  libvorbisfile.a  libvorbisfile.la  libvorbis.la  libvpx.a  libx264.a  libyasm.a  pkgconfig

The earlier installation and compile seemed to go without any fatal errors.

ffmpeg]# x264 --version
x264 0.144.2 40bb568
built on Feb  7 2015, gcc: 4.4.7 20120313 (Red Hat 4.4.7-11)
configuration: --bit-depth=8 --chroma-format=all
x264 license: GPL version 2 or later

gcc -L /software/ffmpeg/ffmpeg_build/lib -Wl,--as-needed -Wl,-z,noexecstack -o /tmp/ffconf.1JUlLYR1 /tmp/ffconf.aCGCwfvJ.o -lx264 -lvpx -lvpx -lvpx -lvpx -lvorbisenc -lvorbis -logg -lmp3lame -lfdk-aac -lm -lz -pthread -lrt
/software/ffmpeg/ffmpeg_build/lib/libx264.a(opencl.o): In function `x264_opencl_close_library':
opencl.c:(.text+0x5f1): undefined reference to `dlclose'
/software/ffmpeg/ffmpeg_build/lib/libx264.a(opencl.o): In function `x264_opencl_load_library':
opencl.c:(.text+0x643): undefined reference to `dlopen'
opencl.c:(.text+0x65c): undefined reference to `dlsym'
opencl.c:(.text+0x676): undefined reference to `dlsym'
opencl.c:(.text+0x690): undefined reference to `dlsym'
opencl.c:(.text+0x6aa): undefined reference to `dlsym'
opencl.c:(.text+0x6c4): undefined reference to `dlsym'
/software/ffmpeg/ffmpeg_build/lib/libx264.a(opencl.o):opencl.c:(.text+0x6de): more undefined references to `dlsym' follow
/software/ffmpeg/ffmpeg_build/lib/libx264.a(opencl.o): In function `x264_opencl_load_library':
opencl.c:(.text+0x944): undefined reference to `dlclose'
/software/ffmpeg/ffmpeg_build/lib/libx264.a(opencl.o): In function `x264_opencl_lookahead_init':
opencl.c:(.text+0x18f8): undefined reference to `dlopen'
opencl.c:(.text+0x1913): undefined reference to `dlsym'
opencl.c:(.text+0x1927): undefined reference to `dlsym'
opencl.c:(.text+0x193e): undefined reference to `dlsym'
opencl.c:(.text+0x1952): undefined reference to `dlsym'
opencl.c:(.text+0x1988): undefined reference to `dlclose'
collect2: ld returned 1 exit status
ERROR: libx264 not found


Many thanks for your help.


Rick Butts

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