My understanding looking at 1958575 / https://reviews.llvm.org/D108513 is that GnuWin32 is no longer recommended. There are still references to GnuWin32 in at least the following docs:

• llvm/docs/CMake.rst (https://github.com/llvm/llvm-project/blob/main/llvm/docs/CMake.rst)
• clang/CMakeLists.txt (https://github.com/llvm/llvm-project/blob/main/clang/CMakeLists.txt)
• clang/www/get_started.html (https://github.com/llvm/llvm-project/blob/main/clang/www/get_started.html)
• clang/www/hacking.html (https://github.com/llvm/llvm-project/blob/main/clang/www/hacking.html)

Thanks