http://bugs.gentoo.org/329153
https://savannah.gnu.org/bugs/index.php?29968

--- tests/scripts/features/recursion	2005/02/10 00:10:58	1.2
+++ tests/scripts/features/recursion	2010/07/01 07:16:00	1.3
@@ -16,7 +16,7 @@
 	@echo MAKELEVEL = $(MAKELEVEL)
 	@echo THE END
 ',
-              ('CFLAGS=-O -w' . ($parallel_jobs ? '-j 2' : '')),
+              ('CFLAGS=-O -w' . ($parallel_jobs ? ' -j 2' : '')),
               ($vos
                ? "#MAKE#: Entering directory `#PWD#'
 make 'CFLAGS=-O' -f #MAKEFILE# foo