libm/w_lgamma.c

   1 /* @(#)w_lgamma.c 5.1 93/09/24 */
   2 /*
   3  * ====================================================
   4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   5  *
   6  * Developed at SunPro, a Sun Microsystems, Inc. business.
   7  * Permission to use, copy, modify, and distribute this
   8  * software is freely granted, provided that this notice
   9  * is preserved.
  10  * ====================================================
  11  */
  12
  13 /* double lgamma(double x)
  14  * Return the logarithm of the Gamma function of x.
  15  *
  16  * Method: call __ieee754_lgamma_r
  17  */
  18
  19 #include <math.h>
  20 #include "math_private.h"
  21
  22 double
  23 lgamma(double x)
  24 {
  25         return lgamma_r(x, &signgam);
  26 }
  27
  28 libm_hidden_def(lgamma)
  29
  30 /* NB: gamma function is an old name for lgamma.
  31  * It is deprecated.
  32  * Some C math libraries redefine it as a "true gamma", i.e.,
  33  * not a ln(|Gamma(x)|) but just Gamma(x), but standards
  34  * introduced tgamma name for that.
  35  */
  36 strong_alias(lgamma, gamma)
  37 libm_hidden_def(gamma)