It would seem that the right to license one's own
work as one chooses is
one of those rights. How does French law resolve that conflict?
By declaring that the contract where the contractant "chooses" to
waive a fundamental right is void.
You find the same line of thought in Jean Jacques Rousseau's social contract :
"To say that a man gives himself gratuitously, is to say what is
absurd and inconceivable; such an act is null and illegitimate, from
the mere fact that he who does it is out of his mind."
French : "Dire qu’un homme se donne gratuitement, c’est dire une chose
absurde et inconcevable ; un tel acte est illégitime et nul, par cela
seul que celui qui le fait n’est pas dans son bon sens. "
http://en.wikisource.org/wiki/The_Social_Contract/Book_I#4._Slavery