https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105522
--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> --- it seems to fail "forever" (at least back to 5.5) minimal reproducer: typedef const struct __CFString * CFStringRef; static void create_usage_match(const unsigned int page, const unsigned int usage, int *okay) { const void *keys[2] = { (void *) ((CFStringRef) __builtin___CFStringMakeConstantString ("" "DeviceUsagePage" "")) , (void *) ((CFStringRef) __builtin___CFStringMakeConstantString ("" "DeviceUsage" "")) }; }