https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98861
--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to cqwrteur from comment #11) > Functions without thread-safety are always terrible. Like all functions in > cctype. They should be avoided like plague. It's thread-safe though. What are you talking about? (In reply to cqwrteur from comment #12) > stdio.h should not get included in any circumstances for EH. You are > implementing the operating system, but you need to enable EH by the standard > and EH relies on stdio. Chicken-egg problem. It doesn't depend on stdio though. What are you talking about?