Besides the Mingw toolchain, there is also the CrossWindows toolchain,
which means GNU-style cli but genuine windows headers + libraries. LLD's
MinGW driver is as good a fit as binutil's ld, but there is no easy way
to select it when lld was being rewritten to lld-link.
This makes lld always be the GNU-style one, consistent with the non-msvc
case. It's a small breaking change for Windows, but the only
It may seem silly to worry about the gnu-style flags, but it is useful
for mixing software designed with MinGW in mind with "real" windows
software that needs a MSVC C++ ABI, C++ threads, etc.
Testing in conjunction with https://github.com/NixOS/nixpkgs/pull/72366,
which might be the first fully automated way to cross compile to
Windows. I haven't taught Nixpkgs to wrap clang-cl like it wraps clang,
so even for some packages that have separate MSVC and MinGW builds
systems (e.g. zlib, opensll), I seem to be having better luck with the
MinGW-style builds so am going with that.