Re: Advanced Auto-Dependency Generation

[Greg Chicares]

On 2005-04-12 12:36 PM, Greg Kilfoyle wrote:
> I have implemented dependency generation based on the information from
> this web page: http://make.paulandlesley.org/autodep.html
[...]
> 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.

Dependency files cache information that this technique needs;
it breaks if you remove them. Make won't recreate them when
that happens--they're created only as a side effect of the .o
rule. But you could guard against that by executing
  for z in *.o; { [ ! -e ${z%.o}.d ] && rm $z }
to remove any .o file whose .d file is gone.