https://github.com/xbjfk/mkcross

I wrote a python script to bring up a Linux or MingW toolchain in around 30 seconds (6 times faster than musl cross make). It uses a pre-installed version of clang rather than compiling an entirely new compiler. Apart from speed, this approach has another advantage: the toolchains can be used on any computer with any OS or architecture as long as it has clang.