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/env/Makefile b/tools/env/Makefile
index 9ce477c..1f16768 100644
--- a/tools/env/Makefile
+++ b/tools/env/Makefile
@@ -1,5 +1,5 @@
#
-# (C) Copyright 2002
+# (C) Copyright 2002-2006
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# See file CREDITS for list of people who contributed to this
@@ -21,25 +21,28 @@
# MA 02111-1307 USA
#
-SOURCES := crc32.c fw_env.c fw_env_main.c
-HEADERS := fw_env.h
+include $(TOPDIR)/config.mk
-all: fw_printenv
+SRCS := $(obj)crc32.c fw_env.c fw_env_main.c
+HEADERS := fw_env.h
-fw_printenv: $(SOURCES) $(HEADERS)
- $(CROSS_COMPILE)gcc -Wall -DUSE_HOSTCC $(SOURCES) -o fw_printenv
+CPPFLAGS := -Wall -DUSE_HOSTCC
+
+all: $(obj)fw_printenv
+
+$(obj)fw_printenv: $(SRCS) $(HEADERS)
+ $(CROSS_COMPILE)gcc $(CPPFLAGS) $(SRCS) -o $(obj)fw_printenv
clean:
- rm -f fw_printenv crc32.c
+ rm -f $(obj)fw_printenv $(obj)crc32.c
-crc32.c:
- ln -s ../../lib_generic/crc32.c crc32.c
+$(obj)crc32.c:
+ ln -s $(src)../../lib_generic/crc32.c $(obj)crc32.c
#########################################################################
-.depend: Makefile $(SOURCES)
- $(CC) -M $(HOST_CFLAGS) $(CPPFLAGS) -DUSE_HOSTCC $(SOURCES) > $@
+include $(TOPDIR)/rules.mk
-sinclude .depend
+sinclude $(obj).depend
#########################################################################