From: wolf <wolf@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Fri, 6 Oct 2000 11:38:01 +0000 (+0000)
Subject: Avoid warning for missing math function declarations.
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7766dfa99a05cb810b01ec91088c15428a42b30c;p=dealii-svn.git

Avoid warning for missing math function declarations.


git-svn-id: https://svn.dealii.org/trunk@3387 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/deal.II/source/numerics/derivative_approximation.cc b/deal.II/deal.II/source/numerics/derivative_approximation.cc
index dcc4727af7..78433a828b 100644
--- a/deal.II/deal.II/source/numerics/derivative_approximation.cc
+++ b/deal.II/deal.II/source/numerics/derivative_approximation.cc
@@ -23,6 +23,9 @@
 #include <fe/fe_values.h>
 #include <numerics/derivative_approximation.h>
 
+#include <cmath>
+
+
 
 template <typename T>
 static T sqr (const T t)