From f93286397ed2a7084efb0362a43ee09f11702349 Mon Sep 17 00:00:00 2001
From: Marian Balakowicz <m8@semihalf.com>
Date: Fri, 1 Sep 2006 19:49:50 +0200
Subject: 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.
---
 board/xilinx/ml300/Makefile | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

(limited to 'board/xilinx/ml300/Makefile')

diff --git a/board/xilinx/ml300/Makefile b/board/xilinx/ml300/Makefile
index 880c494..4ecf37a 100644
--- a/board/xilinx/ml300/Makefile
+++ b/board/xilinx/ml300/Makefile
@@ -1,5 +1,5 @@
 #
-# (C) Copyright 2000
+# (C) Copyright 2000-2006
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 #
 # See file CREDITS for list of people who contributed to this
@@ -19,14 +19,22 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 # MA 02111-1307 USA
+#
 
 include $(TOPDIR)/config.mk
+ifneq ($(OBJTREE),$(SRCTREE))
+$(shell mkdir -p $(obj)../common)
+$(shell mkdir -p $(obj)../xilinx_enet)
+$(shell mkdir -p $(obj)../xilinx_iic)
+endif
 
-CFLAGS   += -I../ml300 -I../common -I../xilinx_enet -I../xilinx_iic
+INCS		:= -I../ml300 -I../common -I../xilinx_enet -I../xilinx_iic
+CFLAGS		+= $(INCS)
+HOST_CFLAGS	+= $(INCS)
 
-LIB	= lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).a
 
-OBJS	= $(BOARD).o \
+COBJS	= $(BOARD).o \
 	  serial.o \
 	  ../xilinx_enet/emac_adapter.o  ../xilinx_enet/xemac.o \
 	  ../xilinx_enet/xemac_options.o ../xilinx_enet/xemac_polled.o \
@@ -39,6 +47,10 @@ OBJS	= $(BOARD).o \
 
 SOBJS	= init.o
 
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
 $(LIB):	$(OBJS) $(SOBJS)
 	$(AR) crv $@ $^
 
@@ -50,9 +62,9 @@ distclean:	clean
 
 #########################################################################
 
-.depend:	Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c)
-		$(CC) -M $(CFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
 
-sinclude .depend
+sinclude $(obj).depend
 
 #########################################################################
-- 
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