https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71199
--- Comment #8 from Yu Xuanchi <yuxuanchiadm at 126 dot com> --- I have test extern "C" in clang. Look like clang dose not actually mangled it to "C format". I think because clang C front-end actually not have any mangle logic. So it just mangled it like CPP front-end does.
