Ticket #18351: foo.c

#include <math.h>
#include <float.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>

#define ASSERT(x) do { if (!(x)) abort (); } while (0)

int
main (void)
{
  volatile double x1;
  volatile long double x2;
  int y1;
  int y2;

  x1 = 0.0;
  y1 = ilogb (x1);

  x2 = 0.0L;
  y2 = ilogbl (x2);

  printf ("%d %d %d\n", y1, y2, FP_ILOGB0);

  // This assertion failed in Haiku 2017.
  if (!(y1 == FP_ILOGB0 && y2 == FP_ILOGB0))
    abort ();

  // This assertion fails in Haiku r1beta4.
  if (!(FP_ILOGB0 == INT_MIN || FP_ILOGB0 == -INT_MAX))
    abort ();
}