Re: Changing "make clean" and "make cleandir"

[Alan Barrett <apb%cequrux.com@localhost>]

On Tue, 27 Sep 2011, Simon J. Gerraty wrote:
> I generally like the idea of bsd.*.mk all just populating CLEAN*
>
> I'm not so crazy about attempting to clean the src tree unless 
> explicitly requested.

Would you suggest a variable or a target for that, and do you have 
name suggestions?

> Apart from the issues cited of read-only src trees, it is a 
> waste of time, when you never allow building without objdirs.

If you have a polluted read-only src tree, then the "ls" test in 
the new code will fail, letting you know that the src tree is 
polluted.  If you have an unpolluted src tree, then the extra "rm" 
and "ls" commands do take some extra time, but it's negligible 
compared to the time for recursing through a sub-make process in 
each subdir.

How would you suggest implementing a policy of never building 
without objdirs?

> FWIW I also favor 'make destroy' (which rm -rf's the objdir) 
> over 'make clean*'.  Destroy is much faster, and more 
> reliable/thorough, and since if using auto.obj.mk the objdir 
> will be auto created when next you run make - no hassle.

Can you share an implementation of auto.obj.mk?

--apb (Alan Barrett)