Another Clang-specific way to handle the case insensitivity is by making use of a virtual file system (VFS) overlay. https://github.com/llvm/llvm-project/blob/4976d1fe58f89169ef... demonstrates how that works. (There's no linker equivalent that I'm aware of, so you do have to use the symlinks or something like ciopfs for that; https://github.com/llvm/llvm-project/blob/4976d1fe58f89169ef... is an example of symlink generation.)