Index: fltk2-r6671/makeinclude.in
===================================================================
--- fltk2-r6671.orig/makeinclude.in	2010-11-03 02:16:42.106000002 +0100
+++ fltk2-r6671/makeinclude.in	2010-11-03 02:16:43.163002267 +0100
@@ -54,6 +54,7 @@
 
 # flags for C++ compiler:
 OPTIM		= @OPTIM@
+CPPFLAGS	= @CPPFLAGS@
 CFLAGS		= $(OPTIM) @CFLAGS@
 CXXFLAGS	= $(OPTIM) @CXXFLAGS@
 
@@ -124,11 +125,11 @@
 
 .c.o:
 	echo Compiling $<...
-	$(CC) -I.. -I../fltk/compat $(CFLAGS) -c $<
+	$(CC) $(CPPFLAGS) -I.. -I../fltk/compat $(CFLAGS) -c $<
 
 .cxx.o:
 	echo Compiling $<...
-	$(CXX) -I.. -I../fltk/compat $(CXXFLAGS) -c $<
+	$(CXX) $(CPPFLAGS) -I.. -I../fltk/compat $(CXXFLAGS) -c $<
 
 .man.0 .man.1 .man.3:
 	echo Formatting $<...