https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106852
--- Comment #4 from Boris Kolpackov <boris at kolpackov dot net> --- FWIW, this project contains a subset of module interface files that (reportedly) can be used to build a (probably incomplete) `std` module with `libstdc++` using Clang (the README says it requires `libc++` but I've confirmed with the author it is tested with both `libstdc++` and `libc++`): https://github.com/alibaba/async_simple/tree/CXX20Modules/third_party_module/stdmodules I am putting it out there in case someone is looking for a potential starting point: maybe we could get going using Clang while GCC's modules support is being worked into shape (and I am glad to see there was some progress on this front for 14).