gcc-4_9/gcc/testsuite/gcc.target/arm/fp16-compile-none-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-mfp16-format=none" } */
   3
   4 /* __fp16 type name is not recognized unless you explicitly enable it
   5    by selecting -mfp16-format=ieee or -mfp16-format=alternative.  */
   6 __fp16 xx = 0.0;  /* { dg-error "unknown type name" } */