Add support for a saving build objects in a separate directory.

Modifications are based on the linux kernel approach and
support two use cases:

  1) Add O= to the make command line
  'make O=/tmp/build all'

  2) Set environement variable BUILD_DIR to point to the desired location
  'export BUILD_DIR=/tmp/build'
  'make'

The second approach can also be used with a MAKEALL script
'export BUILD_DIR=/tmp/build'
'./MAKEALL'

Command line 'O=' setting overrides BUILD_DIR environent variable.

When none of the above methods is used the local build is performed and
the object files are placed in the source directory.

1 files changed, 17 insertions, 3 deletions

diff --git a/MAKEALL b/MAKEALL
index 720ab03bd3..d2f86d3ac8 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -8,7 +8,17 @@ else
 	MAKE=make
 fi
 
-[ -d LOG ] || mkdir LOG || exit 1
+if [ "${MAKEALL_LOGDIR}" ] ; then
+	LOG_DIR=${MAKEALL_LOGDIR}
+else
+	LOG_DIR="LOG"
+fi
+	
+if [ ! "${BUILD_DIR}" ] ; then
+	BUILD_DIR="."
+fi
+
+[ -d ${MAKEALL_LOGDIR} ] || mkdir ${MAKEALL_LOGDIR} || exit 1
 
 LIST=""
 
@@ -303,8 +313,12 @@ build_target() {
 
 	${MAKE} distclean >/dev/null
 	${MAKE} ${target}_config
-	${MAKE} ${JOBS} all 2>&1 >LOG/$target.MAKELOG | tee LOG/$target.ERR
-	${CROSS_COMPILE:-ppc_8xx-}size u-boot | tee -a LOG/$target.MAKELOG
+
+	${MAKE} ${JOBS} all 2>&1 >${LOG_DIR}/$target.MAKELOG \
+				| tee ${LOG_DIR}/$target.ERR
+
+	${CROSS_COMPILE:-ppc_8xx-}size ${BUILD_DIR}/u-boot \
+				| tee -a ${LOG_DIR}/$target.MAKELOG
 }
 
 #-----------------------------------------------------------------------