I'm not sure how willing I'd be to trust a pthread library fork from a single no-name github person. The mingw-w64 project provides libwinpthread, which you can

I'm not sure how willing I'd be to trust a pthread library fork from a single no-name github person. The mingw-w64 project provides libwinpthread, which you can download as source from their sourceforge, or as a binary+headers from a well-known repository like msys2.