File 1-make-clean.patch of Package plumed

--- plumed-2.7.2/Makefile.orig	2021-11-11 12:22:18.329238439 +0100
+++ plumed-2.7.2/Makefile	2021-11-11 12:27:08.493586107 +0100
@@ -83,7 +83,7 @@
 	rm -f *~ */*~ */*/*~
 
 $(SUBDIRSCLEAN): %.clean:
-	$(MAKE) -C $* clean
+	[ ! -e $* ] || $(MAKE) -C $* clean
 
 distclean: fullclean