[CMake] get_directory_property and get_property

[Petr Kmoch]

Hi James.

Quoting the docs at http://www.cmake.org/cmake/help/v2.8.12/cmake.html:

"""

get_property(<variable>
               <GLOBAL             |
                DIRECTORY [dir]    |
...

DIRECTORY scope defaults to the current directory but another directory
(already processed by CMake) may be named by full or relative path.

...

VARIABLE scope is unique and does not accept a name.

"""

When you pass VARIABLE as the argument, it will query the
value/setness/definedness of the variable specified by 'PROPERTY
name'.

So in effect:

get_property(foo VARIABLE PROPERTY bar)

is equivalent to

set(foo ${bar})

Hope this helps.

Petr



On Wed, Apr 16, 2014 at 9:35 PM, James Bigler <jamesbigler at gmail.com> wrote:

> I see that I can get the value of a variable from a directory using:
>
> get_directory_property(sub1_val1 DIRECTORY sub1 DEFINITION val1)
>
> Can I do the same thing with get_property?
>
> I see a VARIABLE entry, but I can't use that with the DIRECTORY indication.
>
> By the way what are the properties on VARIABLE that can be queried?  I
> don't see any documentation for this question.
>
> get_property(... VARIABLE PROPERTY ???)
>
> Thanks,
> James
>
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