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/board/voiceblue/Makefile b/board/voiceblue/Makefile
index 6302fa8..fa614f8 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 b77c91c..d55daa4 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