gcc/testsuite/gcc.dg/c11-float-7.c

   1 /* Test C11 definition of LDBL_EPSILON.  Based on
   2    gcc.target/powerpc/rs6000-ldouble-2.c.  */
   3 /* { dg-do run } */
   4 /* { dg-options "-std=c11 -pedantic-errors" } */
   5
   6 #include <float.h>
   7
   8 extern void abort (void);
   9 extern void exit (int);
  10
  11 int
  12 main (void)
  13 {
  14   volatile long double ee = 1.0;
  15   long double eps = ee;
  16   while (ee + 1.0 != 1.0)
  17     {
  18       eps = ee;
  19       ee = eps / 2;
  20     }
  21   if (eps != LDBL_EPSILON)
  22     abort ();
  23   exit (0);
  24 }