Comment Re:A valuable skill (Score 1) 997
Actually - his question was if you don't distribute how is it illegal. The answer is it's not. The GPL only comes into force when you distribute the program. Though if you've distributed source and not a binary it's even more of a grey area as the source isn't using Qt libraries at all. It's just text.
Though so long as you don't distribute either source or a binary to anybody then you're perfectly legal.