Add cvsclean target for standalone extensions.

build/rules_pear.mk

@@ -55,6 +55,12 @@ distclean: distclean-recursive clean-x
 	rm -f config.cache config.log config.status config_vars.mk libtool \
 	php_config.h stamp-h Makefile build-defs.h php4.spec libphp4.module
 
+cvsclean:
+	@for i in `find . -name .cvsignore`; do \
+		(cd `dirname $$i` 2>/dev/null && rm -rf `cat .cvsignore` *.o *.a || true); \
+	done
+	@rm -f $(SUBDIRS) 2>/dev/null || true
+
 install-modules:
 	@test -d modules && \
 	$(mkinstalldirs) $(moduledir) && \