Autoconf generic exception for GPL-3.0
Autoconf-exception-generic-3.0
This exception is the same as Autoconf-exception-generic, but it adds a sentence related to GPL-3.0.
As a special exception to the GNU General Public License, if you distribute this file as part of a program that contains a configuration script generated by Autoconf, you may include it under the same distribution terms that you use for the rest of that program. This Exception is an additional permission under section 7 of the GNU General Public License, version 3 ("GPLv3").