1 // RUN: %clang_cc1 -fsyntax-only -verify %s 2 #if !__has_attribute(warning) 3 #warning "warning attribute missing" 4 #endif 5 6 __attribute__((warning("don't call me!"))) int good0(void); 7 8 __attribute__((warning)) // expected-error {{'warning' attribute takes one argument}} 9 int 10 bad0(void); 11 12 int bad1(__attribute__((warning("bad1"))) int param); // expected-error {{'warning' attribute only applies to functions}} 13 bad2(void)14int bad2(void) { 15 __attribute__((warning("bad2"))); // expected-error {{'warning' attribute cannot be applied to a statement}} 16 } 17 18 __attribute__((warning(3))) // expected-error {{expected string literal as argument of 'warning' attribute}} 19 int 20 bad3(void); 21 22 __attribute__((warning("foo"), warning("foo"))) int good1(void); 23 __attribute__((warning("foo"))) int good1(void); good1(void)24__attribute__((warning("foo"))) int good1(void) {} 25 26 __attribute__((warning("foo"), error("foo"))) // expected-error {{'error' and 'warning' attributes are not compatible}} 27 int 28 bad4(void); 29 // expected-note@-3 {{conflicting attribute is here}} 30 31 /* 32 * Note: we differ from GCC here; rather than support redeclarations that add 33 * or remove this fn attr, we diagnose such differences. 34 */ 35 36 void foo(void); // expected-note {{previous declaration is here}} 37 __attribute__((warning("oh no foo"))) void foo(void); // expected-error {{'warning' attribute does not appear on the first declaration}} 38