From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 1 Dec 2020 18:39:28 +0000 (-0700)
Subject: Use inline functions instead of constexpr variables.
X-Git-Tag: v9.3.0-rc1~822^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F11293%2Fhead;p=dealii.git

Use inline functions instead of constexpr variables.
---

diff --git a/include/deal.II/base/std_cxx17/cmath.h b/include/deal.II/base/std_cxx17/cmath.h
index 756ba5ed6e..6e402ac9ac 100644
--- a/include/deal.II/base/std_cxx17/cmath.h
+++ b/include/deal.II/base/std_cxx17/cmath.h
@@ -28,12 +28,29 @@ DEAL_II_NAMESPACE_OPEN
 namespace std_cxx17
 {
 #ifndef DEAL_II_HAVE_CXX17_BESSEL_FUNCTIONS
-  constexpr double (&cyl_bessel_j)(double, double) =
-    boost::math::cyl_bessel_j<double, double>;
-  constexpr float (&cyl_bessel_jf)(float, float) =
-    boost::math::cyl_bessel_j<float, float>;
-  constexpr long double (&cyl_bessel_jl)(long double, long double) =
-    boost::math::cyl_bessel_j<long double, long double>;
+
+  inline double
+  cyl_bessel_j(double x, double y)
+  {
+    return boost::math::cyl_bessel_j(x, y);
+  }
+
+
+
+  inline float
+  cyl_bessel_jf(float x, float y)
+  {
+    return boost::math::cyl_bessel_j(x, y);
+  }
+
+
+
+  inline long double
+  cyl_bessel_jl(long double x, long double y)
+  {
+    return boost::math::cyl_bessel_j(x, y);
+  }
+
 #else
   using std::cyl_bessel_j;
   using std::cyl_bessel_jf;