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/cpu/mpc824x/Makefile b/cpu/mpc824x/Makefile
index df0d64e..d9fd9bf 100644
--- a/cpu/mpc824x/Makefile
+++ b/cpu/mpc824x/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
@@ -22,26 +22,35 @@
#
include $(TOPDIR)/config.mk
+ifneq ($(OBJTREE),$(SRCTREE))
+$(shell mkdir -p $(obj)drivers/epic)
+$(shell mkdir -p $(obj)drivers/i2c)
+endif
-LIB = lib$(CPU).a
+LIB = $(obj)lib$(CPU).a
-START = start.S
-OBJS = traps.o cpu.o cpu_init.o interrupts.o speed.o \
- drivers/epic/epic1.o drivers/i2c/i2c.o pci.o bedbug_603e.o
+START = start.o
+COBJS = traps.o cpu.o cpu_init.o interrupts.o speed.o \
+ drivers/epic/epic1.o drivers/i2c/i2c.o pci.o
+COBJS_LN = bedbug_603e.o
-all: .depend $(START) $(LIB)
+SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c) $(addprefix $(obj),$(COBJS_LN:.o=.c))
+OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS) $(COBJS_LN))
+START := $(addprefix $(obj),$(START))
+
+all: $(obj).depend $(START) $(LIB)
$(LIB): $(OBJS)
$(AR) crv $@ $(OBJS)
-bedbug_603e.c:
- ln -s ../mpc8260/bedbug_603e.c bedbug_603e.c
+$(obj)bedbug_603e.c:
+ ln -s $(src)../mpc8260/bedbug_603e.c $(obj)bedbug_603e.c
#########################################################################
-.depend: Makefile $(START:.o=.S) $(OBJS:.o=.c)
- $(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) > $@
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
-sinclude .depend
+sinclude $(obj).depend
#########################################################################