gcc/testsuite/gcc.target/aarch64/target_attr_17.c - gcc - Git at Google

 __attribute__((target("invalid-attr-string")))
 int
 foo (int a)
 {
   return a + 5;
 }

 /* { dg-error "attribute 'target\\(\"invalid-attr-string\"\\)' is not valid" "" { target *-*-* } 0 } */
	__attribute__((target("invalid-attr-string")))
	int
	foo (int a)
	{
	return a + 5;
	}

	/* { dg-error "attribute 'target\\(\"invalid-attr-string\"\\)' is not valid" "" { target --* } 0 } */