gcc/testsuite/gcc.dg/c11-floatn-4.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-std=c11 -pedantic-errors" } */
   3 /* { dg-add-options float64x } */
   4 /* { dg-require-effective-target float64x } */
   5
   6 _Float64x a             /* { dg-error "ISO C does not support the '_Float64x' type before C23" } */
   7   = 1.0F64x;            /* { dg-error "non-standard suffix on floating constant before C23" } */
   8 __extension__ _Float64x b
   9   = 2.0F64x;