These FF_API_<FEATURE> flags come and go often, so the lists inside build.rs will keep growing. I think it makes sense to annotate these with the versions when they first and last appear in their respective version.h/version_major.h headers.
It would
make it a lot easier to remove flags whenever support for old versions is dropped
make it possible to see which flags are possible in the current version, so that downstream users know which FF_API features they can drop when upgrading FFmpeg version
These
FF_API_<FEATURE>flags come and go often, so the lists insidebuild.rswill keep growing. I think it makes sense to annotate these with the versions when they first and last appear in their respectiveversion.h/version_major.hheaders.It would