cmake_minimum_required(VERSION 3.17) project(TestRubyFailExact LANGUAGES NONE) # Should always fail since there is NO ruby 1.9.9 (goes from 1.9.3 to 2.0.0) find_package(Ruby 1.9.9 EXACT REQUIRED) if (NOT Ruby_FOUND) message (FATAL_ERROR "Failed to find Ruby 1.9.9") endif()