egor duda writes:
Hi!
I've created a patch to busybox' build system to allow building it in
separate tree in a manner similar to kbuild from kernel version 2.6.
That is, one runs command like
'make O=/build/some/where/for/specific/target/and/options'
and everything is built in this exact directory, provided that it exists.
I understand that applyingc such invasive changes during 'release
candidates' stage of development is at best unwise. So, i'm currently
asking for comments about this patch, starting from whether such thing
is needed at all to whether it coded properly.
'make check' should work now, and one make creates Makefile in build
directory, so one can run 'make' in build directory after that.
One possible caveat is that if we build in some directory other than
source one, the source directory should be 'distclean'ed first.
egor
diff --git a/networking/udhcp/Makefile b/networking/udhcp/Makefile
index 2b79d22..3d32db5 100644
--- a/networking/udhcp/Makefile
+++ b/networking/udhcp/Makefile
@@ -17,13 +17,15 @@
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
-TOPDIR:= ../../
+top_srcdir=../..
+top_builddir=../..
+srcdir=$(top_srcdir)/networking/udhcp
UDHCP_DIR:=./
-include $(TOPDIR).config
-include $(TOPDIR)Rules.mak
+include $(top_builddir)/Rules.mak
+include $(top_builddir)/.config
include Makefile.in
all: $(libraries-y)
--include $(TOPDIR).depend
+-include $(top_builddir)/.depend
clean:
rm -f *.o *.a $(AR_TARGET)
diff --git a/networking/udhcp/Makefile.in b/networking/udhcp/Makefile.in
index b480794..2d7a088 100644
--- a/networking/udhcp/Makefile.in
+++ b/networking/udhcp/Makefile.in
@@ -19,8 +19,9 @@
UDHCP_AR:=udhcp.a
ifndef $(UDHCP_DIR)
-UDHCP_DIR:=$(TOPDIR)networking/udhcp/
+UDHCP_DIR:=$(top_builddir)/networking/udhcp/
endif
+srcdir=$(top_srcdir)/networking/udhcp
#ok, so I forgot how to do an or, but this is a quick and dirty hack
ifeq ($(CONFIG_UDHCPC), y)
@@ -48,6 +49,6 @@
$(UDHCP_DIR)$(UDHCP_AR): $(UDHCP_OBJS)
$(AR) -ro $@ $(UDHCP_OBJS)
-$(UDHCP_OBJS): %.o : %.c
+$(UDHCP_OBJS): $(UDHCP_DIR)%.o : $(srcdir)/%.c
$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -DIN_BUSYBOX -c $< -o $@