This testcase fails on MinGW targets, because when compiling the main() function, it gets an implicit call to __main(), which is missing in this context. See 4c642b62b99fa128c180f28278637b32be5e5576 and 9b282afb8ac1c810da684591c27faf6117e62e3b for existing precedent for such XFAILs.