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/mpc8xx/Makefile b/cpu/mpc8xx/Makefile
index de75fad..6451e05 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 @@
# 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
#########################################################################