Excellent work. I like to ignore visual studio completely and pretend it doesn't exist, but that's just me :)
I've used cygwin's cross-compiler x86_64-w64-mingw32-clang package once in a while, though I find more projects' build systems choke on it and do the wrong thing (libgmp as a notable example) than with x86_64-w64-mingw32-gcc.
I tend to ignore both gcc and MSVC. Clang is really good at bootstrapping itself with this setup even when cross compiling without any real complexity. Without diverting into a cmake vs autotools battle I like that llvm and clang just work and bootstrap so easily. Gone are the days of messing around with gmp isl and co to bootstrap a toolchain.
Fair enough, but I actually need gmp more for runtime math, plus fortran deps like lapack and more obscure things. Maybe flang will be production-worthy some day - do you know if they're still outputting a textual representation of IR into string buffers?
