On Mon, Jul 14, 2008 at 08:34:40AM +0100, Martin Ling wrote: > > The technical differences between system calls and library calls are > surely irrelevant here, i.e. the same should apply to libraries. ...though having written this, it dawns on me that the FSF and others believe otherwise; i.e. a program that uses a library is a derived work of that library - hence the LGPL. How use of a library implies derivation when use of the operating system does not, is something I'd still like to know. Martin