My question is how one can tell if a compiled binary uses GPL-ed source? Can't one take a GPL-ed source, build it in his program, compile and then sell it without telling that he used a GPL- ed source originally? How this could be prevented?
You mean like Microsoft does? Just deny that you do and never open the source code to study, like Microsoft does.
That's what I think of. If one write a relatively complex program and parts of it are based on GPL programs, after compiling and not giving out the source it will be very difficult to prove that that the given program is built from 'stolen' programs. IG ___________________________________________________________________________ Digitális fényképezőgépek, videokamerák, MP3 lejátszók a legszélesebb választékban! FotoMarket - http://www.fotomarket.hu