Building with MSYS2 and GCC about mozjs HOT 2 OPEN

According the to the Firefox Supported Build Targets, mingw-gcc is not supported due to clang-bindgen. Even mingw-clang is only tier 2.

If Firefox doesn't support it, I don't really think we should patch it so that it can. It would probably be a pain to maintain it.

from mozjs.

I interpret that as "Well, you have to have clang installed anyway, so why bother?", though cannot track down further details. That line appears to have been there when the page was copied over from MDN, but (edit: the page as a whole) no longer exists there, so any change history that might reveal who made it, or reference a bug ID is obscured.

In the long run, that folks are actively working on Rust in the Linux kernel and gccrs suggests that one day bindgen might not require clang. Beyond that, many of the changes would be equally relevant to building with clang and MSYS2, as they relate more to the tooling outside of the specific compiler chosen.

from mozjs.