CMake: split options and conditions, closes #716 As described in the issue, the CMake process force off a cache variable when a condition is not met. If the user installs the requirements and re-run CMake it must also set the variable to on which is inconvenient. The new process is to add a secondary variable and do not touch user defined options.

[Unit]
Description=IRC Client Daemon
After=network.target

[Service]
Type=forking
ExecStart=@PATH@

[Install]
WantedBy=multi-user.target