I've figure out. Some throw error, some throw warning. Those who throw warning are those where a constructor is defined, those with error are those where there is no constructor defined. Default constructor is apparently not enough for the Intel compiler, just adding an empty constructor transform the error in a warning. I'll try also the shekh suggestion, it seems safer to me...
Edit : With skeh suggestion, there not even the warning anymore. I'll update to this, even if maybe it's not realy necessary, i don't like warning if i can avoir them...
