How to add specified lib path in the dependency file

[sgu]

Hi All,

I am involved in Vxworks OS related projects in WinXP OS.
but the original makefile is hard to use.
My project's architecture is like folows:
c:/project/source/xxx/xxx.c
c:/project/lib/objxxx/objxxx.o
c:/project/config/all/makefile
c:/project/config/all/xxx/makefile
c:/project/config/all/xxx/xxx.d
I use "CC -MD" produce the xxx.d file automatically.
and include the dependency file in makefile.

but it still can not work, since the xxx.d is like the follows:
xxx.o: a.c b.c d.h

The rule take no actions, it should be like follows:
c:/project/lib/objxxx/xxx.o: a.c b.c d.h ...

I know the prefix path, but how to insert it to dependency file
automatically?

I tried to use sed as follows:

$(LIBDIR)/%.o : %.c
$(CC) -MD $(CFLAGS) $@ $<
sed -e s/$(@F)/$(LIBDIR)\$(@F)/ $(patsubst %.o,%.d,$(@F))> $(patsubst
%.o,%.d,$(@F)).tmp
$(MV) $(patsubst %.o,%.d,$(@F)).tmp $(patsubst %.o,%.d,$(@F))


but it failed, since the sed command run as follows:

sed -e s/aaa.o/c:/project/lib/objaaa/aaa.o/ aaa.d > aaa.d.tmp

"/" will be ignored,
so it will be:
c:projectlibobjxxxobjxxx.o: a.c b.c d.h

Any good comments about my puzzle is very appreciated.

P.S.
Is there a variable can be set in GNU makefile, that can add a
specified prefix path for the target in dependency file?
Regards!
Sailor