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astmath.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2010 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
/*
 * used to test if -last requires -lm
 *
 *    arch        -last             -lm
 *    ----        -----             ---
 *    linux.sparc sfdlen,sfputd           frexp,ldexp 
 */

#if N >= 8
#define _ISOC99_SOURCE  1
#endif

#include <math.h>

int
main()
{
#if N & 1
      long double value = 0;
#else
      double            value = 0;
#endif
#if N < 5
      int         exp = 0;
#endif

#if N == 1
      return ldexpl(value, exp) != 0;
#endif
#if N == 2
      return ldexp(value, exp) != 0;
#endif
#if N == 3
      return frexpl(value, &exp) != 0;
#endif
#if N == 4
      return frexp(value, &exp) != 0;
#endif
#if N == 5
      return isnan(value);
#endif
#if N == 6
      return isnan(value);
#endif
#if N == 7
      return copysign(1.0, value) < 0;
#endif
#if N == 8
      return signbit(value);
#endif
}

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