diff -r 81e878c53615 -r fb19af007ffc make/defs.make
--- a/make/defs.make	Fri Oct 05 13:37:08 2012 -0700
+++ b/make/defs.make	Wed Oct 10 14:35:58 2012 -0400
@@ -22,6 +22,27 @@
 #  
 #
 
+# The common definitions for hotspot builds.
+
+# Optionally include SPEC file generated by configure.
+ifneq ($(SPEC),)
+  include $(SPEC)
+endif
+
+# Directory paths and user name
+# Unless GAMMADIR is set on the command line, search upward from
+# the current directory for a parent directory containing "src/share/vm".
+# If that fails, look for $GAMMADIR in the environment.
+# When the tree of subdirs is built, this setting is stored in each flags.make.
+GAMMADIR := $(shell until ([ -d dev ]&&echo $${GAMMADIR:-/GAMMADIR/}) || ([ -d src/share/vm ]&&pwd); do cd ..; done)
+HS_SRC_DIR=$(GAMMADIR)/src
+HS_MAKE_DIR=$(GAMMADIR)/make
+HS_BUILD_DIR=$(GAMMADIR)/build
+
+ifeq ($(USER),)
+  USER=$(USERNAME)
+endif
+
 ifeq ($(HS_ALT_MAKE),)
   ifneq ($(OPENJDK),true)
     HS_ALT_MAKE=$(GAMMADIR)/make/closed
@@ -30,12 +51,10 @@
   endif
 endif
 
-# The common definitions for hotspot builds.
-
-# Optionally include SPEC file generated by configure.
-ifneq ($(SPEC),)
-  include $(SPEC)
-endif
+#
+# Include alternate defs.make if it exists
+#
+-include $(HS_ALT_MAKE)/defs.make
 
 # Default to verbose build logs (show all compile lines):
 MAKE_VERBOSE=y
@@ -84,20 +103,6 @@
   endif
 endif
 
-# Directory paths and user name
-# Unless GAMMADIR is set on the command line, search upward from
-# the current directory for a parent directory containing "src/share/vm".
-# If that fails, look for $GAMMADIR in the environment.
-# When the tree of subdirs is built, this setting is stored in each flags.make.
-GAMMADIR := $(shell until ([ -d dev ]&&echo $${GAMMADIR:-/GAMMADIR/}) || ([ -d src/share/vm ]&&pwd); do cd ..; done)
-HS_SRC_DIR=$(GAMMADIR)/src
-HS_MAKE_DIR=$(GAMMADIR)/make
-HS_BUILD_DIR=$(GAMMADIR)/build
-
-ifeq ($(USER),)
-  USER=$(USERNAME)
-endif
-
 # hotspot version definitions
 include $(GAMMADIR)/make/hotspot_version
 
@@ -339,3 +344,4 @@
 EXPORT_LIST += $(EXPORT_INCLUDE_DIR)/jfr.h
 endif
 
+.PHONY: $(HS_ALT_MAKE)/defs.make