brew install FiloSottile/musl-cross/musl-cross
brew install mingw-w64
cp /usr/local/Cellar/mingw-w64/6.0.0_2/toolchain-x86_64/x86_64-w64-mingw32/lib/{crt2.o,dllcrt2.o,libmsvcrt.a} ~/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-pc-windows-gnu/lib/
~/.cargo/config
[target.x86_64-unknown-linux-musl]
linker = "x86_64-linux-musl-gcc"
[target.x86_64-pc-windows-gnu]
linker = 'x86_64-w64-mingw32-gcc'