[Cmake] Using gtk-config to find pacakges

[Amitha Perera]

Hi all

I haven't been following the CMake development closely recently, so I
apologise if this a FAQ.

Is there a recent CMake way to find, for example, GTK using the Unix
gtk-config script? If so, is it reliable? Any pitfalls I should be
aware of?

Thanks,
Amitha.