--- old/common/autoconf/hotspot-spec.gmk.in	2014-08-26 12:57:23.252396700 +0200
+++ new/common/autoconf/hotspot-spec.gmk.in	2014-08-26 12:57:23.160392784 +0200
@@ -97,8 +97,6 @@
 endif
 
 HOTSPOT_MAKE_ARGS:=@HOTSPOT_MAKE_ARGS@ @STATIC_CXX_SETTING@
-# This is used from the libjvm build for C/C++ code.
-HOTSPOT_BUILD_JOBS:=$(JOBS)
 # Control wether Hotspot runs Queens test after building
 TEST_IN_BUILD=@TEST_IN_BUILD@
 
--- old/make/HotspotWrapper.gmk	2014-08-26 12:57:23.668414406 +0200
+++ new/make/HotspotWrapper.gmk	2014-08-26 12:57:23.572410320 +0200
@@ -42,7 +42,7 @@
 # not doing it breaks builds on msys.
 $(HOTSPOT_OUTPUTDIR)/_hotspot.timestamp: $(HOTSPOT_FILES)
 	@$(MKDIR) -p $(HOTSPOT_OUTPUTDIR)
-	@($(CD) $(HOTSPOT_TOPDIR)/make && $(MAKE) -j1 $(HOTSPOT_MAKE_ARGS) SPEC=$(HOTSPOT_SPEC) BASE_SPEC=$(BASE_SPEC))
+	@($(CD) $(HOTSPOT_TOPDIR)/make && $(MAKE) $(HOTSPOT_MAKE_ARGS) SPEC=$(HOTSPOT_SPEC) BASE_SPEC=$(BASE_SPEC))
 	$(TOUCH) $@
 
 hotspot: $(HOTSPOT_OUTPUTDIR)/_hotspot.timestamp
--- old/hotspot/make/Makefile	2014-08-26 12:57:24.092432453 +0200
+++ new/hotspot/make/Makefile	2014-08-26 12:57:23.984427855 +0200
@@ -877,3 +877,5 @@
 	create_jdk copy_jdk update_jdk test_jdk \
 	copy_product_jdk copy_fastdebug_jdk copy_debug_jdk  \
 	$(HS_ALT_MAKE)/Makefile.make remove_old_debuginfo
+
+.NOTPARALLEL:
--- old/hotspot/make/aix/Makefile	2014-08-26 12:57:24.544451692 +0200
+++ new/hotspot/make/aix/Makefile	2014-08-26 12:57:24.428446754 +0200
@@ -256,36 +256,36 @@
 
 $(SUBDIRS_TIERED): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=tiered
+	+$(BUILDTREE) VARIANT=tiered
 
 $(SUBDIRS_C2): $(BUILDTREE_MAKE)
 ifeq ($(FORCE_TIERED),1)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-		$(BUILDTREE) VARIANT=tiered FORCE_TIERED=1
+	+$(BUILDTREE) VARIANT=tiered FORCE_TIERED=1
 else
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-		$(BUILDTREE) VARIANT=compiler2
+	+$(BUILDTREE) VARIANT=compiler2
 endif
 
 $(SUBDIRS_C1): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=compiler1
+	+$(BUILDTREE) VARIANT=compiler1
 
 $(SUBDIRS_CORE): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=core
+	+$(BUILDTREE) VARIANT=core
 
 $(SUBDIRS_ZERO): $(BUILDTREE_MAKE) platform_zero
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=zero VARIANTARCH=$(VARIANTARCH)
+	+$(BUILDTREE) VARIANT=zero VARIANTARCH=$(VARIANTARCH)
 
 $(SUBDIRS_SHARK): $(BUILDTREE_MAKE) platform_zero
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=shark VARIANTARCH=$(VARIANTARCH)
+	+$(BUILDTREE) VARIANT=shark VARIANTARCH=$(VARIANTARCH)
 
 $(SUBDIRS_MINIMAL1): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=minimal1
+	+$(BUILDTREE) VARIANT=minimal1
 
 
 platform_zero: $(GAMMADIR)/make/$(OSNAME)/platform_zero.in
@@ -379,3 +379,5 @@
 .PHONY: all compiler1 compiler2 core zero shark
 .PHONY: clean clean_compiler1 clean_compiler2 clean_core clean_zero clean_shark docs clean_docs
 .PHONY: checks check_os_version check_j2se_version
+
+.NOTPARALLEL:
--- 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:
--- old/hotspot/make/aix/makefiles/top.make	2014-08-26 12:57:25.452490338 +0200
+++ new/hotspot/make/aix/makefiles/top.make	2014-08-26 12:57:25.328485060 +0200
@@ -69,7 +69,13 @@
 
 # Wierd argument adjustment for "gnumake -j..."
 adjust-mflags   = $(GENERATED)/adjust-mflags
-MFLAGS-adjusted = -r `$(adjust-mflags) "$(MFLAGS)" "$(HOTSPOT_BUILD_JOBS)"`
+# If SPEC is set, it's from configure and it's already controlling concurrency
+# for us. Skip setting -j with HOTSPOT_BUILD_JOBS.
+ifeq ($(SPEC), )
+  MFLAGS-adjusted = -r `$(adjust-mflags) "$(MFLAGS)" "$(HOTSPOT_BUILD_JOBS)"`
+else
+  MFLAGS-adjusted = -r $(MFLAGS)
+endif
 
 
 # default target: update lists, make vm
@@ -116,7 +122,7 @@
 	@+mv $@+ $@
 
 the_vm: vm_build_preliminaries $(adjust-mflags)
-	@$(UpdatePCH)
+	+@$(UpdatePCH)
 	@$(MAKE) -f vm.make $(MFLAGS-adjusted)
 
 install gamma: the_vm
@@ -125,7 +131,7 @@
 # next rules support "make foo.[ois]"
 
 %.o %.i %.s:
-	$(UpdatePCH)
+	+$(UpdatePCH)
 	$(MAKE) -f vm.make $(MFLAGS) $@
 	#$(MAKE) -f vm.make $@
 
@@ -142,3 +148,5 @@
 .PHONY: default vm_build_preliminaries
 .PHONY: lists ad_stuff jvmti_stuff sa_stuff the_vm clean realclean
 .PHONY: checks check_os_version install
+
+.NOTPARALLEL:
--- old/hotspot/make/bsd/Makefile	2014-08-26 12:57:25.884508726 +0200
+++ new/hotspot/make/bsd/Makefile	2014-08-26 12:57:25.776504129 +0200
@@ -250,36 +250,36 @@
 
 $(SUBDIRS_TIERED): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=tiered
+	+$(BUILDTREE) VARIANT=tiered
 
 $(SUBDIRS_C2): $(BUILDTREE_MAKE)
 ifeq ($(FORCE_TIERED),1)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-		$(BUILDTREE) VARIANT=tiered FORCE_TIERED=1
+	+$(BUILDTREE) VARIANT=tiered FORCE_TIERED=1
 else
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-		$(BUILDTREE) VARIANT=compiler2
+	+$(BUILDTREE) VARIANT=compiler2
 endif
 
 $(SUBDIRS_C1): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=compiler1
+	+$(BUILDTREE) VARIANT=compiler1
 
 $(SUBDIRS_CORE): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=core
+	+$(BUILDTREE) VARIANT=core
 
 $(SUBDIRS_ZERO): $(BUILDTREE_MAKE) platform_zero
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=zero VARIANTARCH=$(VARIANTARCH)
+	+$(BUILDTREE) VARIANT=zero VARIANTARCH=$(VARIANTARCH)
 
 $(SUBDIRS_SHARK): $(BUILDTREE_MAKE) platform_zero
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=shark VARIANTARCH=$(VARIANTARCH)
+	+$(BUILDTREE) VARIANT=shark VARIANTARCH=$(VARIANTARCH)
 
 $(SUBDIRS_MINIMAL1): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=minimal1
+	+$(BUILDTREE) VARIANT=minimal1
 
 platform_zero: $(GAMMADIR)/make/$(OSNAME)/platform_zero.in
 	$(SED) 's/@ZERO_ARCHDEF@/$(ZERO_ARCHDEF)/g;s/@ZERO_LIBARCH@/$(ZERO_LIBARCH)/g;' < $< > $@
@@ -392,3 +392,5 @@
 .PHONY: clean clean_compiler1 clean_compiler2 clean_core clean_zero clean_shark docs clean_docs
 .PHONY: checks check_os_version check_j2se_version
 .PHONY: $(HS_ALT_MAKE)/$(OSNAME)/Makefile.make
+
+.NOTPARALLEL:
--- old/hotspot/make/bsd/makefiles/buildtree.make	2014-08-26 12:57:26.324527454 +0200
+++ new/hotspot/make/bsd/makefiles/buildtree.make	2014-08-26 12:57:26.216522856 +0200
@@ -178,7 +178,7 @@
 # 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):
@@ -378,3 +378,5 @@
 FORCE:
 
 .PHONY:  all FORCE
+
+.NOTPARALLEL:
--- old/hotspot/make/bsd/makefiles/top.make	2014-08-26 12:57:26.800547713 +0200
+++ new/hotspot/make/bsd/makefiles/top.make	2014-08-26 12:57:26.684542777 +0200
@@ -69,7 +69,13 @@
 
 # Wierd argument adjustment for "gnumake -j..."
 adjust-mflags   = $(GENERATED)/adjust-mflags
-MFLAGS-adjusted = -r `$(adjust-mflags) "$(MFLAGS)" "$(HOTSPOT_BUILD_JOBS)"`
+# If SPEC is set, it's from configure and it's already controlling concurrency
+# for us. Skip setting -j with HOTSPOT_BUILD_JOBS.
+ifeq ($(SPEC), )
+  MFLAGS-adjusted = -r `$(adjust-mflags) "$(MFLAGS)" "$(HOTSPOT_BUILD_JOBS)"`
+else
+  MFLAGS-adjusted = -r $(MFLAGS)
+endif
 
 
 # default target: update lists, make vm
@@ -125,7 +131,7 @@
 	@+mv $@+ $@
 
 the_vm: vm_build_preliminaries $(adjust-mflags)
-	@$(UpdatePCH)
+	+@$(UpdatePCH)
 	@$(MAKE) -f vm.make $(MFLAGS-adjusted)
 
 install : the_vm
@@ -134,7 +140,7 @@
 # next rules support "make foo.[ois]"
 
 %.o %.i %.s:
-	$(UpdatePCH)
+	+$(UpdatePCH)
 	$(MAKE) -f vm.make $(MFLAGS) $@
 	#$(MAKE) -f vm.make $@
 
@@ -151,3 +157,5 @@
 .PHONY: default vm_build_preliminaries
 .PHONY: lists ad_stuff jvmti_stuff sa_stuff the_vm clean realclean
 .PHONY: checks check_os_version install
+
+.NOTPARALLEL:
--- old/hotspot/make/linux/Makefile	2014-08-26 12:57:27.228565930 +0200
+++ new/hotspot/make/linux/Makefile	2014-08-26 12:57:27.124561504 +0200
@@ -256,36 +256,36 @@
 
 $(SUBDIRS_TIERED): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=tiered
+	+$(BUILDTREE) VARIANT=tiered
 
 $(SUBDIRS_C2): $(BUILDTREE_MAKE)
 ifeq ($(FORCE_TIERED),1)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-		$(BUILDTREE) VARIANT=tiered FORCE_TIERED=1
+	+$(BUILDTREE) VARIANT=tiered FORCE_TIERED=1
 else
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-		$(BUILDTREE) VARIANT=compiler2
+	+$(BUILDTREE) VARIANT=compiler2
 endif
 
 $(SUBDIRS_C1): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=compiler1
+	+$(BUILDTREE) VARIANT=compiler1
 
 $(SUBDIRS_CORE): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=core
+	+$(BUILDTREE) VARIANT=core
 
 $(SUBDIRS_ZERO): $(BUILDTREE_MAKE) platform_zero
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=zero VARIANTARCH=$(VARIANTARCH)
+	+$(BUILDTREE) VARIANT=zero VARIANTARCH=$(VARIANTARCH)
 
 $(SUBDIRS_SHARK): $(BUILDTREE_MAKE) platform_zero
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=shark VARIANTARCH=$(VARIANTARCH)
+	+$(BUILDTREE) VARIANT=shark VARIANTARCH=$(VARIANTARCH)
 
 $(SUBDIRS_MINIMAL1): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=minimal1
+	+$(BUILDTREE) VARIANT=minimal1
 
 
 platform_zero: $(GAMMADIR)/make/$(OSNAME)/platform_zero.in
@@ -399,3 +399,5 @@
 .PHONY: clean clean_compiler1 clean_compiler2 clean_core clean_zero clean_shark docs clean_docs
 .PHONY: checks check_os_version check_j2se_version
 .PHONY: $(HS_ALT_MAKE)/$(OSNAME)/Makefile.make
+
+.NOTPARALLEL:
--- old/hotspot/make/linux/makefiles/buildtree.make	2014-08-26 12:57:27.688585510 +0200
+++ new/hotspot/make/linux/makefiles/buildtree.make	2014-08-26 12:57:27.564580231 +0200
@@ -172,7 +172,7 @@
 # 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):
@@ -377,3 +377,5 @@
 FORCE:
 
 .PHONY:  all FORCE
+
+.NOTPARALLEL:
--- old/hotspot/make/linux/makefiles/top.make	2014-08-26 12:57:28.128604237 +0200
+++ new/hotspot/make/linux/makefiles/top.make	2014-08-26 12:57:28.012599299 +0200
@@ -69,7 +69,13 @@
 
 # Wierd argument adjustment for "gnumake -j..."
 adjust-mflags   = $(GENERATED)/adjust-mflags
-MFLAGS-adjusted = -r `$(adjust-mflags) "$(MFLAGS)" "$(HOTSPOT_BUILD_JOBS)"`
+# If SPEC is set, it's from configure and it's already controlling concurrency
+# for us. Skip setting -j with HOTSPOT_BUILD_JOBS.
+ifeq ($(SPEC), )
+  MFLAGS-adjusted = -r `$(adjust-mflags) "$(MFLAGS)" "$(HOTSPOT_BUILD_JOBS)"`
+else
+  MFLAGS-adjusted = -r $(MFLAGS)
+endif
 
 
 # default target: update lists, make vm
@@ -119,7 +125,7 @@
 	@+mv $@+ $@
 
 the_vm: vm_build_preliminaries $(adjust-mflags)
-	@$(UpdatePCH)
+	+@$(UpdatePCH)
 	@$(MAKE) -f vm.make $(MFLAGS-adjusted)
 
 install: the_vm
@@ -128,7 +134,7 @@
 # next rules support "make foo.[ois]"
 
 %.o %.i %.s:
-	$(UpdatePCH)
+	+$(UpdatePCH)
 	$(MAKE) -f vm.make $(MFLAGS) $@
 	#$(MAKE) -f vm.make $@
 
@@ -145,3 +151,5 @@
 .PHONY: default vm_build_preliminaries
 .PHONY: lists ad_stuff jvmti_stuff sa_stuff the_vm clean realclean
 .PHONY: checks check_os_version install
+
+.NOTPARALLEL:
--- old/hotspot/make/solaris/Makefile	2014-08-26 12:57:28.560622624 +0200
+++ new/hotspot/make/solaris/Makefile	2014-08-26 12:57:28.448617857 +0200
@@ -200,24 +200,24 @@
 
 $(SUBDIRS_TIERED): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=tiered
+	+$(BUILDTREE) VARIANT=tiered
 
 $(SUBDIRS_C2): $(BUILDTREE_MAKE)
 ifeq ($(FORCE_TIERED),1)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-		$(BUILDTREE) VARIANT=tiered FORCE_TIERED=1
+	+$(BUILDTREE) VARIANT=tiered FORCE_TIERED=1
 else
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-		$(BUILDTREE) VARIANT=compiler2
+	+$(BUILDTREE) VARIANT=compiler2
 endif
 
 $(SUBDIRS_C1): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=compiler1
+	+$(BUILDTREE) VARIANT=compiler1
 
 $(SUBDIRS_CORE): $(BUILDTREE_MAKE)
 	$(QUIETLY) $(MAKE) -f $(GAMMADIR)/make/$(OSNAME)/Makefile checks
-	$(BUILDTREE) VARIANT=core
+	+$(BUILDTREE) VARIANT=core
 
 # Define INSTALL=y at command line to automatically copy JVM into JAVA_HOME
 
@@ -292,3 +292,5 @@
 .PHONY: all compiler1 compiler2 core
 .PHONY: clean clean_compiler1 clean_compiler2 clean_core docs clean_docs
 .PHONY: checks check_os_version check_j2se_version
+
+.NOTPARALLEL:
--- old/hotspot/make/solaris/makefiles/buildtree.make	2014-08-26 12:57:29.012641862 +0200
+++ new/hotspot/make/solaris/makefiles/buildtree.make	2014-08-26 12:57:28.896636925 +0200
@@ -165,7 +165,7 @@
 # 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:
--- old/hotspot/make/solaris/makefiles/top.make	2014-08-26 12:57:29.460660930 +0200
+++ new/hotspot/make/solaris/makefiles/top.make	2014-08-26 12:57:29.348656164 +0200
@@ -62,7 +62,13 @@
 
 # Wierd argument adjustment for "gnumake -j..."
 adjust-mflags   = $(GENERATED)/adjust-mflags
-MFLAGS-adjusted = -r `$(adjust-mflags) "$(MFLAGS)" "$(HOTSPOT_BUILD_JOBS)"`
+# If SPEC is set, it's from configure and it's already controlling concurrency
+# for us. Skip setting -j with HOTSPOT_BUILD_JOBS.
+ifeq ($(SPEC), )
+  MFLAGS-adjusted = -r `$(adjust-mflags) "$(MFLAGS)" "$(HOTSPOT_BUILD_JOBS)"`
+else
+  MFLAGS-adjusted = -r $(MFLAGS)
+endif
 
 
 # default target: update lists, make vm
@@ -136,3 +142,5 @@
 .PHONY: default vm_build_preliminaries
 .PHONY: lists ad_stuff jvmti_stuff trace_stuff sa_stuff the_vm clean realclean
 .PHONY: checks check_os_version install
+
+.NOTPARALLEL: