gcc/testsuite/gcc.target/aarch64/arch-diagnostics-1.c - gcc - Git at Google

 /* { dg-error "unknown" "" {target "aarch64*-*-*" } 0 } */
 /* { dg-options "-O2 -march=dummy" } */

 void f ()
 {
   return;
 }
	/* { dg-error "unknown" "" {target "aarch64--" } 0 } /
	/* { dg-options "-O2 -march=dummy" } */

	void f ()
	{
	return;
	}