As a special exception, the copyright owners of the
macro gives unlimited permission to copy, distribute and modify the
configure scripts that are the output of Autoconf when processing the
Macro. You need not follow the terms of the GNU General Public
License when using or distributing such scripts, even though portions
of the text of the Macro appear in them. The GNU General Public
License (GPL) does govern all other use of the material that
constitutes the Autoconf Macro.

This special exception to the GPL applies to versions of the
Autoconf Macro released by this project. When you make and
distribute a modified version of the Autoconf Macro, you may extend
this special exception to the GPL to apply to your modified version as
well.
