https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79820
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- Comment on attachment 40966 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40966 patch It's quite possible that "errno" is a macro for something called "__errno" on some systems, so this would fail to compile. I suggest something like __save_errno instead, and it also needs to be done on line 275.
