Allow parallel builds of the xfstests package

Merge of master-melb:xfs-cmds:32515a by kenmcd.

  Allow parallel builds of the xfstests package

include/buildmacros

@@ -122,14 +122,6 @@ INSTALL_LINGUAS = \
 	done
 endif
 
-SUBDIRS_MAKERULE = \
-	@for d in $(SUBDIRS) ""; do \
-		if test -d "$$d" -a ! -z "$$d"; then \
-			$(ECHO) === $$d ===; \
-			$(MAKEF) -C $$d $@ || exit $$?; \
-		fi; \
-	done
-
 MAN_MAKERULE = \
 	@for f in *.[12345678] ""; do \
 		if test ! -z "$$f"; then \

include/buildrules

@@ -6,16 +6,20 @@ _BUILDRULES_INCLUDED_ = 1
 
 include $(TOPDIR)/include/builddefs
 
-clean clobber : $(SUBDIRS)
+clean clobber : $(addsuffix -clean,$(SUBDIRS))
 	rm -f $(DIRT)
 	@rm -fr .libs
-	$(SUBDIRS_MAKERULE)
+
+%-clean:
+	$(MAKE) -C $* clean
 
 # Never blow away subdirs
 ifdef SUBDIRS
 .PRECIOUS: $(SUBDIRS)
+.PHONY: $(SUBDIRS)
+
 $(SUBDIRS):
-	$(SUBDIRS_MAKERULE)
+	$(MAKE) -C $@
 endif
 
 #
@@ -68,11 +72,13 @@ ifdef LTLIBRARY
 DEPENDSCRIPT := $(DEPENDSCRIPT) | $(SED) -e 's,^\([^:]*\)\.o,\1.lo,'
 endif
 
-depend : $(CFILES) $(HFILES)
-	$(SUBDIRS_MAKERULE)
+depend : $(CFILES) $(HFILES) $(addsuffix -depend,$(SUBDIRS))
 	$(DEPENDSCRIPT) > .dep
 	test -s .dep || rm -f .dep
 
+%-depend:
+	$(MAKE) -C $* depend
+
 # Include dep, but only if it exists
 ifeq ($(shell test -f .dep && echo .dep), .dep)
 include .dep