[CMake] target_link_libraries replacing fully-qualified library with -l<x>

[Stephen Kelly]

Chris Green wrote:

>  this library is found with
> find_library as part of a config.cmake file invoked as part of
> find_package()

Consider reading 

 http://www.cmake.org/cmake/help/v3.1/manual/cmake-packages.7.html

at some point.

find_library and config files don't go together.

Thanks,

Steve.