---
key: autoconf-exception-3.0
short_name: Autoconf exception to GPL 3.0
name: Autoconf exception to GPL 3.0
category: Copyleft Limited
owner: Free Software Foundation (FSF)
homepage_url: http://www.gnu.org/licenses/autoconf-exception-3.0.html
is_exception: yes
spdx_license_key: Autoconf-exception-3.0
text_urls:
    - http://www.gnu.org/licenses/autoconf-exception-3.0.html
other_urls:
    - http://www.gnu.org/licenses/gpl-3.0.txt
standard_notice: |
    This program is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the Free
    Software Foundation, either version 3 of the License, or (at your option)
    any later version.
    This program is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
    more details.
    You should have received a copy of the GNU General Public License along
    with this program. If not, see <http://www.gnu.org/licenses/>.
    AUTOCONF CONFIGURE SCRIPT EXCEPTION
    Version 3.0, 18 August 2009
    Copyright © 2009 Free Software Foundation, Inc. <http://fsf.org/>
    Everyone is permitted to copy and distribute verbatim copies of this
    license document, but changing it is not allowed.
    This Exception is an additional permission under section 7 of the GNU
    General Public License, version 3 ("GPLv3"). It applies to a given file
    that bears a notice placed by the copyright holder of the file stating that
    the file is governed by GPLv3 along with this Exception.
    The purpose of this Exception is to allow distribution of Autoconf's
    typical output under terms of the recipient's choice (including
    proprietary).
    0. Definitions.
    "Covered Code" is the source or object code of a version of Autoconf that
    is a covered work under this License.
    "Normally Copied Code" for a version of Autoconf means all parts of its
    Covered Code which that version can copy from its code (i.e., not from its
    input file) into its minimally verbose, non-debugging and non-tracing
    output.
    "Ineligible Code" is Covered Code that is not Normally Copied Code.
    1. Grant of Additional Permission.
    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.
    2. No Weakening of Autoconf Copyleft.
    The availability of this Exception does not imply any general presumption
    that third-party software is unaffected by the copyleft requirements of the
    license of Autoconf.
ignorable_copyrights:
    - Copyright (c) 2009 Free Software Foundation, Inc. <http://fsf.org/>
ignorable_holders:
    - Free Software Foundation, Inc.
ignorable_urls:
    - http://fsf.org/
---

AUTOCONF CONFIGURE SCRIPT EXCEPTION

Version 3.0, 18 August 2009

Copyright © 2009 Free Software Foundation, Inc. <http://fsf.org/>

Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.

This Exception is an additional permission under section 7 of the GNU General Public License, version 3 ("GPLv3"). It applies to a given file that bears a notice placed by the copyright holder of the file stating that the file is governed by GPLv3 along with this Exception.

The purpose of this Exception is to allow distribution of Autoconf's typical output under terms of the recipient's choice (including proprietary).

0. Definitions.
"Covered Code" is the source or object code of a version of Autoconf that is a covered work under this License.

"Normally Copied Code" for a version of Autoconf means all parts of its Covered Code which that version can copy from its code (i.e., not from its input file) into its minimally verbose, non-debugging and non-tracing output.

"Ineligible Code" is Covered Code that is not Normally Copied Code.

1. Grant of Additional Permission.
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.

2. No Weakening of Autoconf Copyleft.
The availability of this Exception does not imply any general presumption that third-party software is unaffected by the copyleft requirements of the license of Autoconf.