Add comments. Safeguard against multiple inclusion.

git-svn-id: https://svn.dealii.org/trunk@11070 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/tests/tests.h b/tests/tests.h
index c7363050bcc3045180274d12ddd0a271cad989ef..c7e4993f6abd57eaeb9135b1edf79c686c589c90 100644 (file)
--- a/tests/tests.h
+++ b/tests/tests.h
@@ -45,6 +45,14 @@ LogStream & operator << (LogStream &logstream,
 }
 
 
+
+#ifndef DEAL_II_STACKTACE_SWITCH
+#define DEAL_II_STACKTACE_SWITCH
+
+// A structure and a variable that are used to make sure that we do
+// not show a stacktrace in out testcases, since this would lead to
+// trouble with automatic comparison of output against a fixed
+// baseline
 struct SwitchOffStacktrace
 {
     SwitchOffStacktrace ()
@@ -53,5 +61,6 @@ struct SwitchOffStacktrace
       }
 } deal_II_stacktrace_dummy;
 
+#endif
 
 #endif // __tests_tests_h