Added clean and clobber targets.
diff --git a/Doc/tools/sgmlconv/Makefile b/Doc/tools/sgmlconv/Makefile
index 7416718..3574fea 100644
--- a/Doc/tools/sgmlconv/Makefile
+++ b/Doc/tools/sgmlconv/Makefile
@@ -27,3 +27,15 @@
(cd $$DIR; \
$(MAKE) -f $(SGMLRULES) TOOLSDIR=../$(TOOLSDIR) xml) \
done
+
+clean:
+ for DIR in $(SUBDIRS) ; do \
+ (cd $$DIR; \
+ $(MAKE) -f $(SGMLRULES) TOOLSDIR=../$(TOOLSDIR) clean) \
+ done
+
+clobber:
+ for DIR in $(SUBDIRS) ; do \
+ (cd $$DIR; \
+ $(MAKE) -f $(SGMLRULES) TOOLSDIR=../$(TOOLSDIR) clobber) \
+ done