https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101385
--- Comment #2 from Iru Cai <mytbk920423 at gmail dot com> --- Thanks, -gnatwe works for both gcc and gnatmake. I see in the gnat_ugn manual that there is still the -Werror option that causes GCC back end to treat warnings as errors. Is that means -gnatwe is for front end, and -Werror for back end?