Oh good catch, I didn't touch the github actions.

But I have a question now, the dev-alpine.Dockerfile only builds php in zts mode with no extensions - can you use dynamically loaded extensions from package managers then (apt-get, rpm, etc)?

The dev-alpine.Dockerfile file is only intended for contributors/maintainers of FrankenPHP. It is totally internal. It just helps set up a dev environment with GDB and the like that works properly.

For general use of non-static builds, it's better to use Docker or Setup PHP builds (which can also installed using Homebrew etc, and provides a lot of extensions already compiled for ZTS). Documenting how to use Setup PHP with FrankenPHP is on my todolist.

LLD remembers the symbol table of archives that it has previously seen, so if there is a reference from an input file to the right of an archive, LLD will still search that archive for resolving any undefined references. This means that an archive only needs to be included once on the command line and the --start-group and --end-group options are redundant.

https://lld.llvm.org/ELF/warn_backrefs.html

Not needed on MacOS then.

Thank you very much @DubbleClick!