Tests/RunCMake/find_package/RequiredOptionValuesClash.cmake - external/github.com/Kitware/CMake - Git at Google

 set(CMAKE_DISABLE_FIND_PACKAGE_Foo ON)
 set(CMAKE_REQUIRE_FIND_PACKAGE_Foo ON)

 find_package(Foo)
 message(FATAL_ERROR "This error must not be reachable.")
	set(CMAKE_DISABLE_FIND_PACKAGE_Foo ON)
	set(CMAKE_REQUIRE_FIND_PACKAGE_Foo ON)

	find_package(Foo)
	message(FATAL_ERROR "This error must not be reachable.")