Advanced Auto-Dependency Generation

[Greg Kilfoyle]

Hi,

I have implemented dependency generation based on the information from
this web page: http://make.paulandlesley.org/autodep.html

It works great, but my implementation has one serious drawback that I
don't see covered ... maybe I just missed something.

Let's say I have just done a complete build and everything is up-to-
date. I then manually remove a dependency file for a particular .c file
and update a header file that the .c file is dependent on. If I then run
make, the .c file is not rebuilt.

I had a depclean target in our environment, which I removed because of
this problem. But I can't protect against someone 'accidently' removing
a dependency file.

The following is a brief version of our .c->.o rule:

$(objs): $(objdir)/%.o: $(srcdir)/%.c
        gcc -c -MP -MD,$(basename $@).d -MT,'$@ $(basename $@).d'
            -o $@ $<

...after this rule there is an include of the dependency file(s) using
'-' so it can silently fail.

Is this something I've failed to account for in my implementation or
something that is missing from the proposed implementation method?

Cheers, Greg.
-- 
Greg Kilfoyle <address@hidden>