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/ppc4xx/Makefile b/cpu/ppc4xx/Makefile
index 7d6990f..93416b5 100644
--- a/cpu/ppc4xx/Makefile
+++ b/cpu/ppc4xx/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
@@ -23,10 +23,10 @@
include $(TOPDIR)/config.mk
-LIB = lib$(CPU).a
+LIB = $(obj)lib$(CPU).a
START = start.o resetvec.o kgdb.o
-AOBJS = dcr.o
+SOBJS = dcr.o
COBJS = 405gp_pci.o 4xx_enet.o \
bedbug_405.o commproc.o \
cpu.o cpu_init.o i2c.o interrupts.o \
@@ -34,18 +34,20 @@
spd_sdram.o speed.o traps.o usb_ohci.o usbdev.o \
440spe_pcie.o
-OBJS = $(AOBJS) $(COBJS)
+SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
+START := $(addprefix $(obj),$(START))
-all: .depend $(START) $(LIB)
+all: $(obj).depend $(START) $(LIB)
$(LIB): $(OBJS)
$(AR) crv $@ $(OBJS)
#########################################################################
-.depend: Makefile $(START:.o=.S) $(AOBJS:.o=.S) $(COBJS:.o=.c)
- $(CC) -M $(CFLAGS) $(START:.o=.S) $(AOBJS:.o=.S) $(COBJS:.o=.c) > $@
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
-sinclude .depend
+sinclude $(obj).depend
#########################################################################