From df150a9cb5a1a3425f8d4c638182528f4dbb681a Mon Sep 17 00:00:00 2001
From: "kaf24@firebug.cl.cam.ac.uk" <kaf24@firebug.cl.cam.ac.uk>
Date: Wed, 5 Oct 2005 13:32:00 +0100
Subject: [PATCH] Move setting of configuration variables to Config.mk. Allows
 for partial-tree builds to be invoked from a sub-directory. Allow for users
 to include a ".config" with additional custom settings.

Signed-off-by: Michal Ostrowski <mostrows@watson.ibm.com>
---
 Config.mk             | 11 +++++++++++
 Makefile              | 12 +-----------
 buildconfigs/Rules.mk |  2 ++
 xen/Rules.mk          |  3 ++-
 4 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/Config.mk b/Config.mk
index e5f53cbc16..6f104e99e3 100644
--- a/Config.mk
+++ b/Config.mk
@@ -20,6 +20,15 @@ STRIP      = $(CROSS_COMPILE)strip
 OBJCOPY    = $(CROSS_COMPILE)objcopy
 OBJDUMP    = $(CROSS_COMPILE)objdump
 
+# Default is to install to local 'dist' directory.
+DISTDIR ?= $(XEN_ROOT)/dist
+DESTDIR ?= $(DISTDIR)/install
+
+INSTALL      = install
+INSTALL_DIR  = $(INSTALL) -d -m0755
+INSTALL_DATA = $(INSTALL) -m0644
+INSTALL_PROG = $(INSTALL) -m0755
+
 ifeq ($(XEN_TARGET_ARCH),x86_64)
 LIBDIR = lib64
 else
@@ -49,3 +58,5 @@ ACM_USE_SECURITY_POLICY ?= ACM_NULL_POLICY
 XENSTAT_XENTOP ?= y
 
 VTPM_TOOLS ?= n
+
+-include $(XEN_ROOT)/.config
diff --git a/Makefile b/Makefile
index e9e6b82019..91ee5b043a 100644
--- a/Makefile
+++ b/Makefile
@@ -2,23 +2,12 @@
 # Grand Unified Makefile for Xen.
 #
 
-# Default is to install to local 'dist' directory.
-DISTDIR ?= $(CURDIR)/dist
-DESTDIR ?= $(DISTDIR)/install
-
-INSTALL		:= install
-INSTALL_DIR	:= $(INSTALL) -d -m0755
-INSTALL_DATA	:= $(INSTALL) -m0644
-INSTALL_PROG	:= $(INSTALL) -m0755
-
 KERNELS ?= linux-2.6-xen0 linux-2.6-xenU
 # linux-2.4-xen0 linux-2.4-xenU netbsd-2.0-xenU
 # You may use wildcards in the above e.g. KERNELS=*2.4*
 
 XKERNELS := $(foreach kernel, $(KERNELS), $(patsubst buildconfigs/mk.%,%,$(wildcard buildconfigs/mk.$(kernel))) )
 
-export DESTDIR
-
 # Export target architecture overrides to Xen and Linux sub-trees.
 ifneq ($(XEN_TARGET_ARCH),)
 SUBARCH := $(subst x86_32,i386,$(XEN_TARGET_ARCH))
@@ -28,6 +17,7 @@ endif
 # Default target must appear before any include lines
 all: dist
 
+XEN_ROOT=$(CURDIR)
 include Config.mk
 include buildconfigs/Rules.mk
 
diff --git a/buildconfigs/Rules.mk b/buildconfigs/Rules.mk
index 440a9f63d1..a75bd47b0c 100644
--- a/buildconfigs/Rules.mk
+++ b/buildconfigs/Rules.mk
@@ -6,6 +6,8 @@ include Config.mk
 DISTDIR	?= $(CURDIR)/dist
 DESTDIR	?= $(DISTDIR)/install
 
+export DESTDIR
+
 ALLKERNELS = $(patsubst buildconfigs/mk.%,%,$(wildcard buildconfigs/mk.*))
 ALLSPARSETREES = $(patsubst %-xen-sparse,%,$(wildcard *-xen-sparse))
 
diff --git a/xen/Rules.mk b/xen/Rules.mk
index 4c3cb8db4e..d57ca65e51 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -10,7 +10,8 @@ trace       ?= n
 domu_debug  ?= n
 crash_debug ?= n
 
-include $(BASEDIR)/../Config.mk
+XEN_ROOT=$(BASEDIR)/..
+include $(XEN_ROOT)/Config.mk
 
 # Set ARCH/SUBARCH appropriately.
 override COMPILE_SUBARCH := $(XEN_COMPILE_ARCH)
-- 
2.30.2