AUTOCONF CONFIGURE SCRIPT EXCEPTION
Version 3.0, 18 August 2009
Copyright © 2009 Free Software Foundation, Inc. <http://fsf.org/>
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You have permission to propagate output of Autoconf, even if such propagation would otherwise violate the terms of GPLv3. However, if by modifying Autoconf you cause any Ineligible Code of the version you received to become Normally Copied Code of your modified version, then you void this Exception for the resulting covered work. If you convey that resulting covered work, you must remove this Exception in accordance with the second paragraph of Section 7 of GPLv3.
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