I like the idea, it would be more reliable than using FreeConsole from ffi to close the console right after it is made (making it almost invisible).
As for other platforms, there is no such way to hide console from showing, in fact, the creation of the terminals depends on the configuration of the system (often there is no such terminal created, and there is no reliable way to enforce one), and is not required by the process initially.
(if a terminal is required with raylib_r, it is still possible to call on Windows the ffi function AllocConsole to create a terminal)