https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102552
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> --- Oh, it's because it calls eventually decode_cmdline_options_to_array that skips the first argument (program name).
marxin at gcc dot gnu.org via Gcc-bugs Fri, 01 Oct 2021 06:27:13 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102552
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> --- Oh, it's because it calls eventually decode_cmdline_options_to_array that skips the first argument (program name).