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, 6 insertions, 3 deletions

diff --git a/board/integratorap/split_by_variant.sh b/board/integratorap/split_by_variant.sh
index 9f71bab..53b0d1e 100755
--- a/board/integratorap/split_by_variant.sh
+++ b/board/integratorap/split_by_variant.sh
@@ -103,14 +103,17 @@ then
 	echo -n	"#undef CONFIG_CM_TCRAM	" 		>> tmp.fil
 	echo	" /* CM may not have TCRAM */" 		>> tmp.fil
 fi
-mv tmp.fil ./include/config.h
+
+mkdir -p ${obj}include
+mkdir -p ${obj}board/integratorap
+mv tmp.fil ${obj}include/config.h
 # ---------------------------------------------------------
 #	Ensure correct core object loaded first in U-Boot image
 # ---------------------------------------------------------
-sed -r 's/CPU_FILE/cpu\/'$cpu'\/start.o/; s/#.*//' board/integratorap/u-boot.lds.template > board/integratorap/u-boot.lds
+sed -r 's/CPU_FILE/cpu\/'$cpu'\/start.o/; s/#.*//' ${src}board/integratorap/u-boot.lds.template > ${obj}board/integratorap/u-boot.lds
 # ---------------------------------------------------------
 # Complete the configuration
 # ---------------------------------------------------------
-./mkconfig -a integratorap arm $cpu integratorap;
+$MKCONFIG -a integratorap arm $cpu integratorap;
 echo "Variant:: $variant with core $cpu"