cmake find_package(QCA) examples

qgis/QGIS CMakeLists.txt :670 

find_package(QCA REQUIRED)

qgis/QGIS cmake/FindQCA.cmake :69 

# find_package(QCA 2.0.3) works with 2.1.0+, which has a QcaConfigVersion.cmake, but 2.0.3 does not