--- Makefile.orig	Wed Aug  8 18:21:23 2007
+++ Makefile	Wed Oct 31 17:35:20 2007
@@ -51,8 +51,8 @@
           compiledObjects/RootedClusterTree.o compiledObjects/Iteration.o \
           compiledObjects/InFileStream.o compiledObjects/ClustalWResources.o
 
-CXX	= g++
-CXXFLAGS  = -c -O2
+CXX	?= g++
+CXXFLAGS  += -c -DDATADIR=\"${PREFIX}/share/clustalw\"
 LFLAGS	= -g
 
 clustalw2: $(OBJECTS)
