1  /* { dg-do link } */
       2  /* { dg-options "-O2 -ffast-math" } */
       3  /* { dg-require-effective-target c99_runtime } */
       4  
       5  extern int ilogbf (float);
       6  extern float logbf (float);
       7  extern int ilogb (double);
       8  extern double logb (double);
       9  extern int ilogbl (long double);
      10  extern long double logbl (long double);
      11  
      12  extern void link_error(void);
      13  
      14  void testf(float x)
      15  {
      16    if ((int) logbf (x) != ilogbf (x))
      17      link_error ();
      18  }
      19  
      20  void test(double x)
      21  {
      22    if ((int) logb (x) != ilogb (x))
      23      link_error ();
      24  }
      25  
      26  void testl(long double x)
      27  {
      28    if ((int) logbl (x) != ilogbl (x))
      29      link_error ();
      30  }
      31  
      32  int main()
      33  {
      34    testf (2.0f);
      35    test (2.0);
      36    testl (2.0l);
      37  
      38    return 0;
      39  }
      40