Index: configure
===================================================================
--- configure	(revision d3b7937ae7ab8afece0824b5729b7e86a9f0bd63)
+++ configure	(revision 1b5c81eda8ac4fbd0dbf2cdca2786bc4e7f9cd93)
@@ -2409,4 +2409,10 @@
 
 
+if test "x${CXXFLAGS}" = "x"; then
+   export CXXFLAGS="-std=c++11 -g -O2 ${CXXFLAGS}"
+else
+   export CXXFLAGS="-std=c++11 ${CXXFLAGS}"
+fi
+
 am__api_version='1.11'