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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/complex/csqrt.c
          +++ new/usr/src/lib/libm/common/complex/csqrt.c
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  20   20   */
  21   21  
  22   22  /*
  23   23   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24   24   */
  25   25  /*
  26   26   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  27   27   * Use is subject to license terms.
  28   28   */
  29   29  
  30      -#pragma weak csqrt = __csqrt
       30 +#pragma weak __csqrt = csqrt
  31   31  
  32   32  /* INDENT OFF */
  33   33  /*
  34   34   * dcomplex csqrt(dcomplex z);
  35   35   *
  36   36   *                                         2    2    2
  37   37   * Let w=r+i*s = sqrt(x+iy). Then (r + i s)  = r  - s  + i 2sr = x + i y.
  38   38   *
  39   39   * Hence x = r*r-s*s, y = 2sr.
  40   40   *
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