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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>

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          --- old/usr/src/lib/libm/common/C/cosh.c
          +++ new/usr/src/lib/libm/common/C/cosh.c
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  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 cosh = __cosh
       29 +#pragma weak __cosh = cosh
  30   30  
  31   31  /* INDENT OFF */
  32   32  /*
  33   33   * cosh(x)
  34   34   * Code originated from 4.3bsd.
  35   35   * Modified by K.C. Ng for SUN 4.0 libm.
  36   36   * Method :
  37   37   *      1. Replace x by |x| (cosh(x) = cosh(-x)).
  38   38   *      2.
  39   39   *                                       [ exp(x) - 1 ]^2
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