gcc/testsuite/gcc.dg/Wimplicit-function-declaration-c89-pedantic.c


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/* { dg-do compile } */
/* { dg-options "-std=c89 -pedantic-errors -Wimplicit-function-declaration" } */

void f(void) 
{ 
  puts("Hello"); /* { dg-warning "warning: implicit declaration of function" } */
}