gcc/testsuite/gcc.dg/c2x-float-12.c

   1 /* Test C2x definition of LDBL_EPSILON.  */
   2 /* { dg-do run } */
   3 /* { dg-options "-std=c2x -pedantic-errors" } */
   4
   5 #include <float.h>
   6
   7 extern void abort (void);
   8 extern void exit (int);
   9
  10 int
  11 main (void)
  12 {
  13   volatile long double x = 1.0L;
  14   for (int i = 0; i < LDBL_MANT_DIG - 1; i++)
  15     x /= 2;
  16   if (x != LDBL_EPSILON)
  17     abort ();
  18   exit (0);
  19 }