Add missing include file.

git-svn-id: https://svn.dealii.org/trunk@11298 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/base/source/utilities.cc b/deal.II/base/source/utilities.cc
index 14edb24fbd7869d1a2d86d695cae223c48cdde9f..d9225c0841bf263d4e27736595f319ab59c1820b 100644 (file)
--- a/deal.II/base/source/utilities.cc
+++ b/deal.II/base/source/utilities.cc
@@ -20,6 +20,7 @@
 #include <cstdio>
 #include <ctime>
 #include <cerrno>
+#include <cmath>
 #include <unistd.h>
 #include <sys/types.h>
 #ifdef HAVE_STD_STRINGSTREAM