[CMake] What does `cross-platform' mean?

[Miguel A. Figueroa-Villanueva]

On Mon, Nov 10, 2008 at 10:09 AM, Bill Hoffman wrote:
> Jed Brown wrote:
>> Thanks Bill.  I'm very encouraged by the response this thread has
>> generated and optimistic that the Find* modules will become more robust
>> without undue effort by module writers.
>>
> Well, it is not going to happen over night, but I think we are closer to a
> plan.  I am going to update the wiki with the main three ideas of this
> thread so it does not get lost.
>
> - Standard FOO_DIR for find modules, but environment and cache. Environment
> works like CC and CXX do.
>
> - Add ability to parse compile lines like the ones produced from pkg-config
> and turn them into full paths to libraries.
>
> - Add an easy way to create dependent cache variables, that when changed
> unset a number of other variables.

A while back I had opened a feature request on the third item:

http://public.kitware.com/Bug/view.php?id=7286

I think it is a fairly simple thing to implement if no speed issues
are considered, which I don't think these would be a problem. That is,
save the cache before the configure iteration and check if the entries
listed in the dependencies list have changed. If so, reset the cache
entry.

--Miguel