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
lgamma(double x)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)
38