> A Microsoft exec once described the GPL as "viral' [1] and it's a fair point. It's not. Plain old copyright is viral. A derived work's copying can only be

> A Microsoft exec once described the GPL as "viral' [1] and it's a fair point. It's not. Plain old copyright is viral. A derived work's copying can only be done with permission of original and deriving author. If you use a commercial library, the license you paid for is that permission. If someone then creates a new work from yours, permission is needed from all three authors unless the original library came with those particular redistribution rights.