1// RUN: %clang_cc1 -fsyntax-only %s -verify 2#ifndef __has_warning 3#error Should have __has_warning 4#endif 5 6#if __has_warning("not valid") // expected-warning {{__has_warning expected option name}} 7#endif 8 9#if __has_warning("-Wparentheses") 10#warning Should have -Wparentheses // expected-warning {{Should have -Wparentheses}} 11#endif 12 13#if __has_warning(-Wfoo) // expected-error {{builtin warning check macro requires a parenthesized string}} 14#endif 15 16#if __has_warning("-Wnot-a-valid-warning-flag-at-all") 17#else 18#warning Not a valid warning flag // expected-warning {{Not a valid warning flag}} 19#endif