https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107712
--- Comment #3 from cqwrteur <unlvsur at live dot com> --- (In reply to Jonathan Wakely from comment #2) > Should be fixed now. Question about toupper or any functions in ctype.h These functions are not thread-safe and they do incur a very high cost due to calling into shared libraries even for a very simple task. Plus it is undefined behavior if the character value is above 127. They do not deal with -fexec-charset correctly either. Why not just write your own function which is simpler, faster, and more versatile??
