[Vm-dev] Make question
Bert Freudenberg
bert at freudenbergs.de
Tue Sep 5 09:14:22 UTC 2006
Andreas Raab schrieb:
>
> Hi Folks -
>
> I'm trying to rework the windows build structure and I'm running into a
> problem with make. Basically, what I'm trying to do is to test whether a
> file exists in a given location and if so, copy it, and if not, copy a
> default from elsewhere. This should look like here:
>
> foo.here:
> if $(file-exists locationA/foo.locA)
> cp locationA/foo.locA foo.here
> else
> cp locationB/foo.locB foo.here
> endif
>
> I think you get the idea. My problem is that I can't seem to find a
> reliable way of expressing the line
>
> if $(file-exists locationA/foo.locA)
>
> in any reasonable way (i.e., by using make's functions). Any ideas how
> to convince make to determine whether the file exists or not?
I think you have to use the $(wildcard ...) function to test for file
existence.
Alternatively, you could specify a vpath
(http://www.gnu.org/software/make/manual/html_node/Directory-Search.html)
- Bert -
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