"Tarjei Tj�stheim Jensen" <tarjei@online.no> writes:

> Ted Dennison wrote:
> > Emacs is a text editor that is released under the GPL, yet its output is
> > perfectly usable with whatever license you care to use. Why is this different?
> > As long as you don't try to link against the editor itself, you should be OK.
> 
> This is more similar to bison. I don't know the licensing implications
> of using bison these days, but the output used to be infected with a GPL
> virus.

No more.

Bison 1.28's bison.simple says

  /* As a special exception, when this file is copied by Bison into a
     Bison output file, you may use that output file without restriction.
     This special exception was added by the Free Software Foundation
     in version 1.24 of Bison.  */

-S