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.
---
 cpu/mpc8xx/Makefile | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

(limited to 'cpu/mpc8xx')

diff --git a/cpu/mpc8xx/Makefile b/cpu/mpc8xx/Makefile
index de75fad3c..6451e0551 100644
--- a/cpu/mpc8xx/Makefile
+++ b/cpu/mpc8xx/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
@@ -25,25 +25,29 @@ include $(TOPDIR)/config.mk
 
 # CFLAGS += -DET_DEBUG
 
-LIB	= lib$(CPU).a
+LIB	= $(obj)lib$(CPU).a
 
 START	= start.o kgdb.o
-OBJS	= bedbug_860.o commproc.o cpu.o cpu_init.o	\
+COBJS	= bedbug_860.o commproc.o cpu.o cpu_init.o	\
 	  fec.o i2c.o interrupts.o lcd.o scc.o		\
 	  serial.o speed.o spi.o \
 	  traps.o upatch.o video.o
 SOBJS	= plprcr_write.o
 
-all:	.depend $(START) $(LIB)
+SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+START	:= $(addprefix $(obj),$(START))
 
-$(LIB):	$(OBJS) $(SOBJS)
-	$(AR) crv $@ $(OBJS) $(SOBJS) kgdb.o
+all:	$(obj).depend $(START) $(LIB)
+
+$(LIB):	$(OBJS)
+	$(AR) crv $@ $(OBJS) $(obj)kgdb.o
 
 #########################################################################
 
-.depend:	Makefile $(START:.o=.S) $(OBJS:.o=.c) $(SOBJS:.o=.S)
-		$(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) $(SOBJS:.o=.S) > $@
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
 
-sinclude .depend
+sinclude $(obj).depend
 
 #########################################################################
-- 
cgit v1.2.3