* Modules/Setup.in: define PYTHONPATH using COREPYTHONPATH for
	extensions; add -lm to math module definition

	* Modules/Makefile.pre.in: remove *.so and so_locations on clobber
diff --git a/Modules/Makefile.pre.in b/Modules/Makefile.pre.in
index 39c3b7c..ff1ca9c 100644
--- a/Modules/Makefile.pre.in
+++ b/Modules/Makefile.pre.in
@@ -88,6 +88,7 @@
 
 clobber:	clean
 		-rm -f *.a tags TAGS config.c glmodule.c Makefile.pre
+		-rm -f *.so so_locations
 
 config.c Makefile: Makefile.pre config.c.in $(MAKESETUP) Setup
 		$(SHELL) $(MAKESETUP) Setup