cmake Cups examples

OpendTect/OpendTect CMakeModules/ODZlibUtils.cmake :271 

find_package( Cups QUIET GLOBAL )

darktable-org/darktable src/CMakeLists.txt :853 

find_package(Cups)

FreeRDP/FreeRDP channels/printer/client/cups/CMakeLists.txt :20 

find_package(Cups 2.0 REQUIRED)

mgba-emu/mgba src/platform/qt/CMakeLists.txt :478 

find_package(Cups)