diff -urpN busybox-1.17.0/applets/usage_compressed busybox-1.17.0-build_system/applets/usage_compressed
--- busybox-1.17.0/applets/usage_compressed	2010-07-04 23:33:59.000000000 +0200
+++ busybox-1.17.0-build_system/applets/usage_compressed	2010-07-10 01:31:18.000000000 +0200
@@ -40,8 +40,4 @@ echo '#define PACKED_USAGE \'
 	-e 's/$/ \\/'
 echo ''
 
-if cmp -s "$target.$$" "$target" 2>/dev/null; then
-    rm -- "$target.$$"
-else
-    mv -- "$target.$$" "$target"
-fi
+mv -- "$target.$$" "$target"
diff -urpN busybox-1.17.0/init/bootchartd.c busybox-1.17.0-build_system/init/bootchartd.c
--- busybox-1.17.0/init/bootchartd.c	2010-07-04 15:32:24.000000000 +0200
+++ busybox-1.17.0-build_system/init/bootchartd.c	2010-07-10 01:31:14.000000000 +0200
@@ -18,7 +18,7 @@
 //config:	  and stopped using bootchartd stop.
 //config:
 //config:config FEATURE_BOOTCHARTD_BLOATED_HEADER
-//config:	bool "bootchartd"
+//config:	bool "Compatible, bloated header"
 //config:	default y
 //config:	depends on BOOTCHARTD
 //config:	help
@@ -35,7 +35,7 @@
 //config:	  makes bootchartd applet to dump a subset of it.
 //config:
 //config:config FEATURE_BOOTCHARTD_CONFIG_FILE
-//config:	bool "bootchartd"
+//config:	bool "Support bootchartd.conf"
 //config:	default y
 //config:	depends on BOOTCHARTD
 //config:	help
diff -urpN busybox-1.17.0/scripts/gen_build_files.sh busybox-1.17.0-build_system/scripts/gen_build_files.sh
--- busybox-1.17.0/scripts/gen_build_files.sh	2010-06-26 00:42:29.000000000 +0200
+++ busybox-1.17.0-build_system/scripts/gen_build_files.sh	2010-07-10 01:31:38.000000000 +0200
@@ -4,6 +4,8 @@ test $# -ge 2 || { echo "Syntax: $0 SRCT
 
 # cd to objtree
 cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
+# In separate objtree build, include/ might not exist yet
+mkdir include 2>/dev/null
 
 srctree="$1"
 
@@ -46,10 +48,12 @@ if test x"$new" != x"$old"; then
 fi
 
 # (Re)generate */Kbuild and */Config.in
-find -type d | while read -r d; do
+{ cd -- "$srctree" && find -type d; } | while read -r d; do
 	d="${d#./}"
+
 	src="$srctree/$d/Kbuild.src"
 	dst="$d/Kbuild"
+	mkdir -p -- "$d" 2>/dev/null
 	if test -f "$src"; then
 		#echo "  CHK     $dst"
 
@@ -69,6 +73,7 @@ find -type d | while read -r d; do
 
 	src="$srctree/$d/Config.src"
 	dst="$d/Config.in"
+	mkdir -p -- "$d" 2>/dev/null
 	if test -f "$src"; then
 		#echo "  CHK     $dst"
 
diff -urpN busybox-1.17.0/scripts/Makefile.build busybox-1.17.0-build_system/scripts/Makefile.build
--- busybox-1.17.0/scripts/Makefile.build	2010-06-24 04:40:43.000000000 +0200
+++ busybox-1.17.0-build_system/scripts/Makefile.build	2010-07-10 01:31:38.000000000 +0200
@@ -13,8 +13,13 @@ __build:
 include scripts/Kbuild.include
 
 # The filename Kbuild has precedence over Makefile
+# bbox: we also try to include Kbuild file in obj tree first
 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
-include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
+include $(if $(wildcard $(src)/Kbuild), $(src)/Kbuild, \
+		$(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, \
+			$(kbuild-dir)/Makefile \
+		) \
+	)
 
 include scripts/Makefile.lib
 
diff -urpN busybox-1.17.0/scripts/test_make_O busybox-1.17.0-build_system/scripts/test_make_O
--- busybox-1.17.0/scripts/test_make_O	1970-01-01 01:00:00.000000000 +0100
+++ busybox-1.17.0-build_system/scripts/test_make_O	2010-07-10 01:31:38.000000000 +0200
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+b=`basename $PWD`
+test "${b#busybox}" != "$b" || { echo "Must be run in busybox tree"; exit 1; }
+
+rm -rf ../testdir_make_O.$$
+mkdir ../testdir_make_O.$$
+odir=`cd ../testdir_make_O.$$ && pwd`
+test -d "$odir" || exit 1
+
+make O="$odir" $MAKEOPTS "$@" defconfig busybox 2>&1 | tee test_make_O.log