https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91287
--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Richard Biener from comment #15) > Honza probably knows where we output the LTO symtab and why we do not put > undefs for builtins there. #include <math.h> double y, z; void foo (); int main() { volatile double x = atan2 (y, z); foo (); } > gcc-8 -c t.c -flto > gcc-nm t.o U foo 00000000 T main 00000000 C y 00000000 C z where's the U atan2 ?