Function umkaInit 

pub unsafe extern "C" fn umkaInit(
    umka: *mut Umka,
    fileName: *const c_char,
    sourceString: *const c_char,
    stackSize: c_int,
    reserved: *mut c_void,
    argc: c_int,
    argv: *mut *mut c_char,
    fileSystemEnabled: bool,
    implLibsEnabled: bool,
    warningCallback: UmkaWarningCallback,
) -> bool