https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79554
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- In the first macro fmt_ isn't defined at all (nor there is a fmt_ variable), so I doubt it compiles at all. And, in the second macro, the warning is 100% correct, fmt_ is a non-const variable, -Wformat-security is a FE warning, so can't rely on any optimizations etc. Probably const char *const fmt_ = fmt; should work, because then it should be able to look at the var's initializer.