[CMake] how to get the version of a library

[brice rebsamen]

brice rebsamen wrote:
> Ralf Habacker wrote:
>> brice rebsamen schrieb:
>>> How to know the version of an installed library? My code has #if 
>>> macros to handle different APIs. So I would need to get the version 
>>> and set 2 variables (MAJOR and MINOR) and pass them to the compiler 
>>> (-D).
>>>
>>> To be more precise, I am interested in Player/Stage. One way to get 
>>> the version is to run the player executable. Under linux:
>>>
>>> VERSION=`player 2>&1 | grep "Player v" | cut -d' ' -f2`
>>> this gives "v2.2.0". Then
>>> MAJOR=`echo $VERSION | cut -d'.' -f2`
>>> MINOR=`echo $VERSION | cut -d'.' -f3`
>>>
>>> I do not particularly need a solution that would work under windows 
>>> at the moment, but that would be a bonus of course.
>> There is a win32 api function for this, see 
>> http://msdn.microsoft.com/en-us/library/ms647003.aspx for more 
>> informations.
>>
>> Regards
>> Ralf
>>
> 
> I am looking for a way to do it with CMake: the information is required 
> at compile time because different versions have a different API. How can 
> I write a script in CMake that would check the library version at 
> configuration time, then either set Makefile variables to be passed to 
> the compiler or write some header file to be included in the source?

Anybody? Even if you cannot think of a OS-independent way its fine. I 
immediately interested in how to do it under Linux, i.e. how to tell 
CMake to run the small script above to retrieve the minor and major of 
the player library.