https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103559
--- Comment #10 from Xi Ruoyao <xry111 at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #9) > isless (NAN, 0.0) should be false, no, so NAN shouldn't errno = EDOM for > glibc. Oh, I misunderstood your question.