Switch to side-by-side view

--- a/src/mk/localdefs.in
+++ b/src/mk/localdefs.in
@@ -12,4 +12,4 @@
 LOCALCXXFLAGS = $(INCICONV) $(XAPIANCXXFLAGS) \
 	      -DRECOLL_DATADIR=\"$(RECOLL_DATADIR)\"
 
-CXXFLAGS = -g -Wall -Wno-unused 
+CXXFLAGS = -g -O2 -Wall -Wno-unused