--- Makefile.in.orig	2014-10-22 17:14:35 UTC
+++ Makefile.in
@@ -85,12 +85,12 @@ stamp-dir :
 	echo timestamp > stamp-dir
 
 src/%.o : $(srcdir)/src/%.cc
-	$(CXX) $(CFLAGS) $(PCRE_CFLAGS) $(INCLUDES) \
+	$(CXX) $(CXXFLAGS) $(PCRE_CFLAGS) $(INCLUDES) \
 		-MMD -MF $(patsubst %.o,%.d, $@) \
 		-c -o $@ $<
 
 src/%.o : src/%.cc
-	$(CXX) $(CFLAGS) $(PCRE_CFLAGS) $(INCLUDES) \
+	$(CXX) $(CXXFLAGS) $(PCRE_CFLAGS) $(INCLUDES) \
 		-MMD -MF $(patsubst %.o,%.d, $@) \
 		-c -o $@ $<