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/voiceblue/Makefile  | 36 ++++++++++++++++++++++--------------
 board/voiceblue/config.mk |  2 +-
 2 files changed, 23 insertions(+), 15 deletions(-)

(limited to 'board/voiceblue')

diff --git a/board/voiceblue/Makefile b/board/voiceblue/Makefile
index 6302fa854..fa614f8d4 100644
--- a/board/voiceblue/Makefile
+++ b/board/voiceblue/Makefile
@@ -1,4 +1,4 @@
-# (C) Copyright 2000-2002
+# (C) Copyright 2000-2006
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de
 #
 # (C) Copyright 2005
@@ -24,43 +24,51 @@
 
 include $(TOPDIR)/config.mk
 
-LIB	= lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).a
 
-OBJS	:= voiceblue.o
+COBJS	:= voiceblue.o
 SOBJS	:= setup.o
 
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c) eeprom.c eeprom_start.S
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
 gcclibdir := $(shell dirname `$(CC) -print-libgcc-file-name`)
 
 LOAD_ADDR = 0x10400000
 LDSCRIPT = $(TOPDIR)/board/$(BOARDDIR)/eeprom.lds
+lnk = $(if $(obj),$(obj),.)
 
-all:	$(LIB) eeprom.srec eeprom.bin
+all:	$(obj).depend $(LIB) $(obj)eeprom.srec $(obj)eeprom.bin
 
 $(LIB):	$(OBJS) $(SOBJS)
 	$(AR) crv $@ $(OBJS) $(SOBJS)
 
-eeprom.srec:	eeprom.o eeprom_start.o
-	$(LD) -T $(LDSCRIPT) -g -Ttext $(LOAD_ADDR) \
-		-o $(<:.o=) -e $(<:.o=) $^ \
-		-L../../examples -lstubs \
-		-L../../lib_generic -lgeneric \
+$(obj)eeprom.srec:	$(obj)eeprom.o $(obj)eeprom_start.o
+	cd $(lnk) && $(LD) -T $(LDSCRIPT) -g -Ttext $(LOAD_ADDR) \
+		-o $(<:.o=) -e eeprom eeprom.o eeprom_start.o \
+		-L$(obj)../../examples -lstubs \
+		-L$(obj)../../lib_generic -lgeneric \
 		-L$(gcclibdir) -lgcc
 	$(OBJCOPY) -O srec $(<:.o=) $@
 
-eeprom.bin:	eeprom.srec
+$(obj)eeprom.bin:	$(obj)eeprom.srec
 	$(OBJCOPY) -I srec -O binary $< $@ 2>/dev/null
 
 clean:
-	rm -f $(SOBJS) $(OBJS) eeprom eeprom.srec eeprom.bin
+	rm -f $(SOBJS) $(OBJS) $(obj)eeprom \
+		$(obj)eeprom.srec $(obj)eeprom.bin \
+		$(obj)eeprom.o $(obj)eeprom_start.o
+
 
 distclean:	clean
 	rm -f $(LIB) core config.tmp *.bak .depend
 
 #########################################################################
 
-.depend:	Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c)
-		$(CC) -M $(CPPFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
 
--include .depend
+sinclude $(obj).depend
 
 #########################################################################
diff --git a/board/voiceblue/config.mk b/board/voiceblue/config.mk
index b77c91c65..d55daa41d 100644
--- a/board/voiceblue/config.mk
+++ b/board/voiceblue/config.mk
@@ -3,7 +3,7 @@
 # entry 1000'8000 (mem base + reserved)
 #
 
-sinclude $(TOPDIR)/board/$(BOARDDIR)/config.tmp
+sinclude $(OBJTREE)/board/$(BOARDDIR)/config.tmp
 
 ifeq ($(VOICEBLUE_SMALL_FLASH),y)
 # We load ourself to internal SRAM at 2001'2000
-- 
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