https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107807
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> --- Thanks for filing this bug; sorry about the test failures. I've tested errno-1.c with glibc's errno.h, and with a simple "extern int errno;". What does <errno.h> look like on your machine? In particular, how is "errno" defined/declared? Thanks.