Check versions for individual components of Wayland

Review Request #116598 - Created March 4, 2014 and submitted - Latest diff uploaded

Information
Aurélien Gâteau
extra-cmake-modules
master
Reviewers
buildsystem, extracmakemodules, kdeframeworks
graesslin
First part of the diff makes sure find_package_handle_standard_args() gets a version number to check against.

Second part ensures we get proper results from pkg-config even if not all components are available. find_package(Wayland COMPONENTS Client Egl) was failing for me because I have Client installed but not Egl, causing pkg_check_modules() to not set any PKG_Wayland_${comp} variable.


Together with a change for kde-workspace, it fixes the build of kde-workspace on my system with wayland-client 1.1 and no wayland-egl.
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