[Bug c++/57241] GCC still issues -Wmultichar warnings despite a #pragma diagnostic ignored -Wmultichar directive

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57241

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
In general, it's safe to say that #pragma diagnostic ignored is very buggy (in
C++ at least), we have got many long standing PRs.