missing cmath

git-svn-id: https://svn.dealii.org/trunk@10427 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/base/include/base/logstream.h b/deal.II/base/include/base/logstream.h
index 3faea5d3e9aff86c896fdc733c923a1037f28c86..f765e022ce7d93dd58dce69216466dd053be2ba8 100644 (file)
--- a/deal.II/base/include/base/logstream.h
+++ b/deal.II/base/include/base/logstream.h
@@ -19,6 +19,7 @@
 
 #include <string>
 #include <stack>
+#include <cmath>
 
 // we only need output streams, but older compilers did not provide
 // them in a separate include file