lgpl build impossible under linux

[AudioVideoIT]

Summary of the bug:
I cannot build a clean LGPL licensed shared object set under linux.
The configure script ignores all my settings and I do not know how to build the wanted shared libraries manually. As soon I am adding the option --enabled-shared the hole build is GPL again!

This makes it impossible for my company to provide closed software under Linux based on FFmpeg.

This would be the changes that a GPL FFmpeg library can stay side by side with my renamed custom build FFmpeg on a linux system:

mv libavcodec.so lgpl_avcodec.so
mv libavcodec.so lgpl_avcodec.so
mv libavdevice.so lgpl_avdevice.so
mv libavfilter.so lgpl_avfilter.so
mv libavformat.so lgpl_avformat.so
mv libavutil.so lgpl_avutil.so
mv libswresample.so lgpl_avresample.so
mv libswscale.so lgpl_swscale.so

patchelf --replace-needed libavformat.so.60 lgpl_avformat.so lgpl_avfilter.so
patchelf --replace-needed libavcodec.so.60 lgpl_avcodec.so lgpl_avfilter.so
patchelf --replace-needed libavutil.so.58 lgpl_avutil.so lgpl_avfilter.so
patchelf --replace-needed libswresample.so.4 lgpl_avresample.so lgpl_avfilter.so
patchelf --replace-needed libswscale.so.7 lgpl_swscale.so lgpl_avfilter.so
patchelf --replace-needed libavutil.so.58 lgpl_avutil.so lgpl_avcodec.so
patchelf --replace-needed libswresample.so.4 lgpl_swresample.so lgpl_avcodec.so
patchelf --replace-needed libavutil.so.58 lgpl_avutil.so lgpl_avresample.so
patchelf --replace-needed libavutil.so.58 lgpl_avutil.so lgpl_swscale.so

How to reproduce:

./configure --disable-gpl --disable-libx264 --disable-libx265 --disable-frei0r
make
./ffmpeg -L
ffmpeg version 6.1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 13.2.1 (GCC) 20230801
  configuration: --disable-gpl --disable-libx264 --disable-libx265 --disable-frei0r --enable-shared
  WARNING: library configuration mismatch
  avutil      configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto --enable-fontconfig --enable-frei0r --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libharfbuzz --enable-libiec61883 --enable-libjack --enable-libjxl --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libplacebo --enable-libpulse --enable-librav1e --enable-librsvg --enable-librubberband --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpl --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc --enable-opencl --enable-opengl --enable-shared --enable-version3 --enable-vulkan

[quinkblack]

Closed source support is out of scope.