I just found out the hard way, that not only cmd.exe has a length limit, but also the CreateProcess() function, which is used to call sh.exe, which in turn calls the compiler/linker has a parameter ...

Note: if you build with optimisations on, then this doesn't happen and the code works, so this only applies to unoptimised/debug builds. I can replicate the codegen on regular clang on Linux using say ...