build-all.py: Update defconfigs with savedefconfig

Copy the savedefconfig (or minimal defconfig) instead of the
.config when updating defconfigs.

Change-Id: I0ba0b7a774dd3de0dc090420bd5c118eb6199eb6
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
(cherry picked from commit 6575c0b29f060a5ebdeec0ff9bcfe0f1af9f0bc8)

1 files changed, 7 insertions, 2 deletions

diff --git a/scripts/build-all.py b/scripts/build-all.py
index 80430e8883d..511527076dd 100755
--- a/scripts/build-all.py
+++ b/scripts/build-all.py
@@ -1,6 +1,6 @@
 #! /usr/bin/env python
 
-# Copyright (c) 2009, The Linux Foundation. All rights reserved.
+# Copyright (c) 2009-2011, The Linux Foundation. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
@@ -137,6 +137,7 @@ def build(target):
         os.mkdir(dest_dir)
     defconfig = 'arch/arm/configs/%s_defconfig' % target
     dotconfig = '%s/.config' % dest_dir
+    savedefconfig = '%s/defconfig' % dest_dir
     shutil.copyfile(defconfig, dotconfig)
 
     devnull = open('/dev/null', 'r')
@@ -159,7 +160,11 @@ def build(target):
 
     # Copy the defconfig back.
     if all_options.configs or all_options.updateconfigs:
-        shutil.copyfile(dotconfig, defconfig)
+        devnull = open('/dev/null', 'r')
+        subprocess.check_call(['make', 'O=%s' % dest_dir,
+            'savedefconfig'], env=make_env, stdin=devnull)
+        devnull.close()
+        shutil.copyfile(savedefconfig, defconfig)
 
 def build_many(allconf, targets):
     print "Building %d target(s)" % len(targets)