I am not doing advocacy or going to write 1000 lines article on how FOSS works.
This one is from Falcon IRC. Here MaikB is the one who is using FalconGtk bindings, Nikopol is the one who is developing it.
<MaikB> Nikopol: After a gtk update falcon-gtk fails to build. I’m investigating..
<MaikB> evidently /usr/include/gdk-pixbuf-2.0 is missing at the list if include directories
<MaikB> My guess: its FindGTK2.cmake fault
<MaikB> oh dear
<MaikB> I’ll put some work into falcon-gtk’s build scripts
<MaikB> its fixed in cmake-2.8.3 http://public.kitware.com/Bug/view.php?id=11186
<MaikB> but we have to ship our own FindGTK2.cmake anyway, since it doesn’t cover the arm crossbuilding
<MaikB> Nikopol: fixed
By the time Nikopol is free, the problem is fixed.