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/tools/Makefile b/tools/Makefile
index d3dcc7d..606f024 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -1,5 +1,5 @@
#
-# (C) Copyright 2000-2003
+# (C) Copyright 2000-2006
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# See file CREDITS for list of people who contributed to this
@@ -21,22 +21,23 @@
# MA 02111-1307 USA
#
-BINS = img2srec$(SFX) mkimage$(SFX) envcrc$(SFX) gen_eth_addr$(SFX) bmp_logo$(SFX)
+BIN_FILES = img2srec$(SFX) mkimage$(SFX) envcrc$(SFX) gen_eth_addr$(SFX) bmp_logo$(SFX)
-OBJS = environment.o img2srec.o mkimage.o crc32.o envcrc.o gen_eth_addr.o bmp_logo.o
+OBJ_LINKS = environment.o crc32.o
+OBJ_FILES = img2srec.o mkimage.o envcrc.o gen_eth_addr.o bmp_logo.o
ifeq ($(ARCH),mips)
-BINS += inca-swap-bytes$(SFX)
-OBJS += inca-swap-bytes.o
+BIN_FILES += inca-swap-bytes$(SFX)
+OBJ_FILES += inca-swap-bytes.o
endif
# Don't build by default
#ifeq ($(ARCH),ppc)
-#BINS += mpc86x_clk$(SFX)
-#OBJS += mpc86x_clk.o
+#BIN_FILES += mpc86x_clk$(SFX)
+#OBJ_FILES += mpc86x_clk.o
#endif
-LOGO_H = $(TOPDIR)/include/bmp_logo.h
+LOGO_H = $(OBJTREE)/include/bmp_logo.h
ifeq ($(LOGO_BMP),)
LOGO_BMP= logos/denx.bmp
@@ -106,69 +107,76 @@
#
include $(TOPDIR)/config.mk
+# now $(obj) is defined
+SRCS := $(addprefix $(obj),$(OBJ_LINKS:.o=.c)) $(OBJ_FILES:.o=.c)
+BINS := $(addprefix $(obj),$(BIN_FILES))
+
#
# Use native tools and options
#
-CPPFLAGS = -idirafter ../include -DTEXT_BASE=$(TEXT_BASE) -DUSE_HOSTCC
+CPPFLAGS = -idirafter $(SRCTREE)/include \
+ -idirafter $(OBJTREE)/include2 \
+ -idirafter $(OBJTREE)/include \
+ -DTEXT_BASE=$(TEXT_BASE) -DUSE_HOSTCC
CFLAGS = $(HOST_CFLAGS) $(CPPFLAGS) -O
AFLAGS = -D__ASSEMBLY__ $(CPPFLAGS)
CC = $(HOSTCC)
STRIP = $(HOSTSTRIP)
MAKEDEPEND = makedepend
-all: .depend $(BINS) $(LOGO_H) subdirs
+all: $(obj).depend $(BINS) $(LOGO_H) subdirs
-envcrc$(SFX): envcrc.o crc32.o environment.o
+$(obj)envcrc$(SFX): $(obj)envcrc.o $(obj)crc32.o $(obj)environment.o
$(CC) $(CFLAGS) -o $@ $^
-img2srec$(SFX): img2srec.o
+$(obj)img2srec$(SFX): $(obj)img2srec.o
$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
$(STRIP) $@
-mkimage$(SFX): mkimage.o crc32.o
+$(obj)mkimage$(SFX): $(obj)mkimage.o $(obj)crc32.o
$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
$(STRIP) $@
-ncb$(SFX): ncb.o
+$(obj)ncb$(SFX): $(obj)ncb.o
$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
$(STRIP) $@
-gen_eth_addr$(SFX): gen_eth_addr.o
+$(obj)gen_eth_addr$(SFX): $(obj)gen_eth_addr.o
$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
$(STRIP) $@
-bmp_logo$(SFX): bmp_logo.o
+$(obj)bmp_logo$(SFX): $(obj)bmp_logo.o
$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
$(STRIP) $@
-inca-swap-bytes$(SFX): inca-swap-bytes.o
+$(obj)inca-swap-bytes$(SFX): $(obj)inca-swap-bytes.o
$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
$(STRIP) $@
-mpc86x_clk$(SFX): mpc86x_clk.o
+$(obj)mpc86x_clk$(SFX): $(obj)mpc86x_clk.o
$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
$(STRIP) $@
-envcrc.o: envcrc.c
- $(CC) -g $(CFLAGS) -c $<
+$(obj)envcrc.o: $(src)envcrc.c
+ $(CC) -g $(CFLAGS) -c -o $@ $<
-crc32.o: crc32.c
- $(CC) -g $(CFLAGS) -c $<
+$(obj)crc32.o: $(obj)crc32.c
+ $(CC) -g $(CFLAGS) -c -o $@ $<
-mkimage.o: mkimage.c
- $(CC) -g $(CFLAGS) -c $<
+$(obj)mkimage.o: $(src)mkimage.c
+ $(CC) -g $(CFLAGS) -c -o $@ $<
-ncb.o: ncb.c
- $(CC) -g $(CFLAGS) -c $<
+$(obj)ncb.o: $(src)ncb.c
+ $(CC) -g $(CFLAGS) -c -o $@ $<
-gen_eth_addr.o: gen_eth_addr.c
- $(CC) -g $(CFLAGS) -c $<
+$(obj)gen_eth_addr.o: $(src)gen_eth_addr.c
+ $(CC) -g $(CFLAGS) -c -o $@ $<
-inca-swap-bytes.o: inca-swap-bytes.c
- $(CC) -g $(CFLAGS) -c $<
+$(obj)inca-swap-bytes.o: $(src)inca-swap-bytes.c
+ $(CC) -g $(CFLAGS) -c -o $@ $<
-mpc86x_clk.o: mpc86x_clk.c
- $(CC) -g $(CFLAGS) -c $<
+$(obj)mpc86x_clk.o: $(src)mpc86x_clk.c
+ $(CC) -g $(CFLAGS) -c -o $@ $<
subdirs:
ifeq ($(TOOLSUBDIRS),)
@@ -184,25 +192,25 @@
done
endif
-environment.c:
- @rm -f environment.c
- ln -s ../common/environment.c environment.c
+$(obj)environment.c:
+ @rm -f $(obj)environment.c
+ ln -s $(src)../common/environment.c $(obj)environment.c
-environment.o: environment.c
- $(CC) -g $(HOST_ENVIRO_CFLAGS) $(CPPFLAGS) -c $<
+$(obj)environment.o: $(obj)environment.c
+ $(CC) -g $(HOST_ENVIRO_CFLAGS) $(CPPFLAGS) -c -o $@ $<
-crc32.c:
- @rm -f crc32.c
- ln -s ../lib_generic/crc32.c crc32.c
+$(obj)crc32.c:
+ @rm -f $(obj)crc32.c
+ ln -s $(src)../lib_generic/crc32.c $(obj)crc32.c
-$(LOGO_H): bmp_logo $(LOGO_BMP)
- ./bmp_logo $(LOGO_BMP) >$@
+$(LOGO_H): $(obj)bmp_logo $(LOGO_BMP)
+ $(obj)./bmp_logo $(LOGO_BMP) >$@
#########################################################################
-.depend: Makefile $(OBJS:.o=.c)
- $(CC) -M $(HOST_CFLAGS) $(CPPFLAGS) $(OBJS:.o=.c) > $@
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
-sinclude .depend
+sinclude $(obj).depend
#########################################################################