5261 libm should stop using synonyms.h
5298 fabs is 0-sized, confuses dis(1) and others
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Approved by: Gordon Ross <gwr@nexenta.com>

          --- old/usr/src/lib/libm/common/complex/carg.c
          +++ new/usr/src/lib/libm/common/complex/carg.c

   1    1  /*
   2    2   * CDDL HEADER START
   3    3   *
   4    4   * The contents of this file are subject to the terms of the
   5    5   * Common Development and Distribution License (the "License").
   6    6   * You may not use this file except in compliance with the License.
   7    7   *
   8    8   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9    9   * or http://www.opensolaris.org/os/licensing.
  10   10   * See the License for the specific language governing permissions
  11   11   * and limitations under the License.
  12   12   *
  13   13   * When distributing Covered Code, include this CDDL HEADER in each
  14   14   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15   15   * If applicable, add the following below this CDDL HEADER, with the
  16   16   * fields enclosed by brackets "[]" replaced with your own identifying
  17   17   * information: Portions Copyright [yyyy] [name of copyright owner]
  18   18   *

  19   19   * CDDL HEADER END
  20   20   */
  21   21  /*
  22   22   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  23   23   */
  24   24  /*
  25   25   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  26   26   * Use is subject to license terms.
  27   27   */
  28   28  
  29      -#pragma weak carg = __carg
       29 +#pragma weak __carg = carg
  30   30  
  31      -#include "libm_synonyms.h"
  32   31  #include <math.h>               /* atan2 */
  33   32  #include "complex_wrapper.h"
  34   33  
  35   34  static const double
  36   35          pi      = 3.14159265358979311600e+00,
  37   36          pi_lo   = 1.22464679914735320717e-16;
  38   37  
  39   38  double
  40   39  carg(dcomplex z) {
  41   40          int     ix, iy;

  42   41  
  43   42          ix = ((int *)&(D_RE(z)))[HIWORD];
  44   43          iy = ((int *)&(D_IM(z)))[HIWORD];
  45   44          if ((((ix | iy) & ~0x80000000) | ((int *)&(D_RE(z)))[LOWORD] |
  46   45              ((int *)&(D_IM(z)))[LOWORD]) == 0) {
  47   46                  /* x and y are both zero */
  48   47                  if (ix == 0)
  49   48                          return (D_IM(z));
  50   49                  return ((iy == 0)? pi + pi_lo : -pi - pi_lo);
  51   50          }
  52   51          return (atan2(D_IM(z), D_RE(z)));
  53   52  }

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