gcc/testsuite/gcc.dg/Werror-implicit-function-declaration.c

   1 /* Test the legacy option -Werror-implicit-function-declaration */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=c89 -Werror-implicit-function-declaration" } */
   4 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
   5 void f(void)
   6 {
   7   puts("Hello"); /* { dg-error "implicit declaration of function" } */
   8 }