cmake GMPXX examples

ladnir/cryptoTools cmake/cryptoToolsDepHelper.cmake :265 

find_package(gmpxx ${ARGS})

kpeeters/cadabra2 c++lib/CMakeLists.txt :92 

find_package(GMPXX REQUIRED)

CGAL/cgal Installation/cmake/modules/CGAL_SetupGMP.cmake :28 

find_package(GMPXX QUIET)