Try installing MSYS2 and then installing the mingw-w64-x86_64-clang (binary) package:
pacman -S mingw-w64-x86_64-clang
It is a bit old at the moment (3.6.2), but it might be good enough for you. Then when you run the Win64 shell provided by MSYS2, clang will be on your path.
If it’s not good enough, I have recently been building a 64-bit version of clang with MSYS2 and using it to compile native 64-bit Windows executables. My process was something like:
- Use pacman to install base-devel, mingw-w64-x86_64-ninja, mingw-x86_64-cmake and perhaps some other packages that are needed by the build process.
- Grab my PKGBUILD script for clang and the files in the same directory. This is based on the mingw-w64-clang-svn package from MSYS2, which is largely the work of Martell Malone. You can find him on the MSYS2 IRC channel and ask him more about it.
- In a Win64, shell, go to the directory with my PKGDUILD, run
export MINGW_INSTALLS=mingw64(so you are only compiling the 64-bit version), and then runmakepkg-mingw.
It is unlikely you will get everything right on the first try, and some files might need to be edited. Clang may have changed since the last time I did this and some patches might not apply cleanly.