This is the successor of #59, which also contains additional info and the discussion history.

This PR contains the needed changes to compile an arm64 musl version of currently supported nodejs versions.

I tested this by building multiple versions of nodejs, and running those in an Alpine container:

• v20.19.5
• v22.19.0
• v24.8.0
• v25.0.0-nightly20250914c8c6bfab2

All of those versions build successfully using GCC 14.2.0, using the local-build.sh script, e.g.

bin/local_build.sh -r arm64-musl -v v24.8.0

This is an updated comment, the initial version (and the PR) also contained info about compiling unsupported versions (v16 and v18).
I removed that part, based in the comments below.