Re: forcing a rule

[Noel Yap]

Boris Kolpackov wrote:

> Noel Yap <address@hidden> writes:
> Sure, everything is possible ;-). Just change 
>
> %/.:
>         @echo mkdir -p $(@)
>
> to be
>
> %/.: | $$(dir\ %).
>         @echo mkdir $(@)
>
> Now '%/.' depends on it's subdirectory. In your case it 
> would expand to 
>
> install/common/make/.: | install/common/.

Wouldn't this produce an infinite loop?  Have you tried this change with the 
patch installed?

> Which is what you need, right? There is a little catch, 
> however. Make doesn't do double expansion in implicit
> rules. If you don't mind patching your make you can find
> a patch that implements double expansion here:
>
>  http://www.kolpackov.net/projects/make/bk/

What are the chances this patch will make it into future releases of GNU make?

Thanks,
Noel