https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63326
--- Comment #16 from Chen Gang <gang.chen.5i5j at gmail dot com> --- Our C++ has no this issue. For precisely saying: cc1 has the issue, but cc1plus has no the issue (if use g++ build c programs, it has no issue; if use gcc build c++ programs, it has no issue, either). But still, for me, it is worthless for gcc and g++ to support this feature.
