--- old/hotspot/make/aix/makefiles/buildtree.make	2014-08-26 12:57:25.000471100 +0200
+++ new/hotspot/make/aix/makefiles/buildtree.make	2014-08-26 12:57:24.888466332 +0200
@@ -173,7 +173,7 @@
 # Run make in each subdirectory recursively.
 $(SUBMAKE_DIRS): $(SIMPLE_DIRS) FORCE
 	$(QUIETLY) [ -d $@ ] || { mkdir -p $@; }
-	$(QUIETLY) cd $@ && $(BUILDTREE) TARGET=$(@F)
+	+$(QUIETLY) cd $@ && $(BUILDTREE) TARGET=$(@F)
 	$(QUIETLY) touch $@
 
 $(SIMPLE_DIRS):
@@ -364,3 +364,5 @@
 FORCE:
 
 .PHONY:  all FORCE
+
+.NOTPARALLEL: