FFmpeg doesn't compile with shared libraries

Question

I ran the ./configure script of FFmpeg as follows:

PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure --prefix="$HOME/ffmpeg_build" --pkg-config-flags="--static" --extra-cflags="-fPIC -m64 -I$HOME/ffmpeg_build/include" --extra-ldflags="-L$HOME/ffmpeg_build/lib" --bindir="$HOME/bin" --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree --enable-pic --extra-ldexeflags=-pie --enable-shared

When I try to compile FFmpeg with --enable-shared option as above, I get this error:

/usr/bin/ld: /home/guel/ffmpeg_build/lib/libx264.a(common.o): relocation R_X86_64_32 against '.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /home/guel/ffmpeg_build/lib/libx264.a: error adding symbols: Bad value collect2: error: ld returned 1 exit status

I had added --enable-pic ,--extra-ldexeflags=-pie as well as -fPIC -m64 to --extra-cflags in order to get rid of this relocation error as suggested here: https://www.ffmpeg.org/platform.html

But I'm still getting the same error. I need to compile ffmpeg with --enable-shared option to interface it with OpenCV, so I have to find a workaround here.

Answer 1

I managed to solve the problem. Actually, the additions -fPIC and --enable-pic should have done the trick, but I stupidly had previously compiled the dependency libraries (libx264 and many others) with --disable-shared option because I didn't care about it when I first compiled FFmpeg and just blindly followed the compilation guide here: https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

After having re-compiled all the libraries with --enable-shared option, FFmpeg also compiled with that option successfully.