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5261 libm should stop using synonyms.h

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          --- old/usr/src/lib/libm/common/C/exp2.c
          +++ new/usr/src/lib/libm/common/C/exp2.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 2006 Sun Microsystems, Inc.  All rights reserved.
  26   26   * Use is subject to license terms.
  27   27   */
  28   28  
  29      -#pragma weak exp2 = __exp2
       29 +#pragma weak __exp2 = exp2
  30   30  
  31   31  /* INDENT OFF */
  32   32  /*
  33   33   * exp2(x)
  34   34   * Code by K.C. Ng for SUN 4.0 libm.
  35   35   * Method :
  36   36   *      exp2(x) = 2**x = 2**((x-anint(x))+anint(x))
  37   37   *              = 2**anint(x)*2**(x-anint(x))
  38   38   *              = 2**anint(x)*exp((x-anint(x))*ln2)
  39   39   */
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