# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1440015525 14400
# Node ID 951019b7afd4bc6309d2d2c21eafc58e32a706a4
# Parent  1a22083b59295db567987951c3ae0286c4595e96
use different approach to avoid gnulib warning

* lo-specfun.cc (xlog): New static inline template with float and
double specializations.
(Lanczos_approximation_psi): Call xlog instead of gnulib::log.

diff -r 1a22083b5929 -r 951019b7afd4 liboctave/numeric/lo-specfun.cc
--- a/liboctave/numeric/lo-specfun.cc	Wed Aug 19 16:09:06 2015 -0400
+++ b/liboctave/numeric/lo-specfun.cc	Wed Aug 19 16:18:45 2015 -0400
@@ -3743,6 +3743,27 @@
 
 static const double pi = 3.14159265358979323846;
 
+template <class T>
+static inline T
+xlog (const T& x)
+{
+  return log (x);
+}
+
+template <>
+inline double
+xlog (const double& x)
+{
+  return gnulib::log (x);
+}
+
+template <>
+inline float
+xlog (const float& x)
+{
+  return gnulib::logf (x);
+}
+
 template<class T>
 static T
 Lanczos_approximation_psi (const T zc)
@@ -3765,7 +3786,7 @@
   T p = 0;
   for (octave_idx_type k = 0; k < 10; k++, overz2k *= overz2)
     p += dg_coeff[k] * overz2k;
-  p += gnulib::log (zc) - T (0.5) / zc;
+  p += xlog (zc) - T (0.5) / zc;
   return p;
 }