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.
diff --git a/board/esd/pf5200/config.mk b/board/esd/pf5200/config.mk
index 07b5de1..170779d 100644
--- a/board/esd/pf5200/config.mk
+++ b/board/esd/pf5200/config.mk
@@ -32,7 +32,7 @@
# 0x00100000 boot from RAM (for testing only)
#
-sinclude $(TOPDIR)/board/$(BOARDDIR)/config.tmp
+sinclude $(OBJTREE)/board/$(BOARDDIR)/config.tmp
ifndef TEXT_BASE
## Standard: boot high