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-rw-r--r--COPYING15
-rw-r--r--GMP-LICENSE11
2 files changed, 17 insertions, 9 deletions
diff --git a/COPYING b/COPYING
index 1cd650bec..bd0076800 100644
--- a/COPYING
+++ b/COPYING
@@ -1,5 +1,5 @@
-CVC4 is copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 by its
-authors and contributors (see the file AUTHORS) and their institutional
+CVC4 is copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 by
+its authors and contributors (see the file AUTHORS) and their institutional
affiliations. All rights reserved.
The source code of CVC4 is open and available to students, researchers,
@@ -218,11 +218,14 @@ Their copyright:
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-CVC4 links against The GNU Multiple Precision Arithmetic Library. It is
-licensed under GNU LGPL v3. See GMP-LICENSE for a copy of the license.
+CVC4 by default links against The GNU Multiple Precision (GMP) Arithmetic
+Library, which is licensed under GNU LGPL v3. See the file GMP-LICENSE for a
+copy of that license. Note that according to the terms of the LGPL, both
+CVC4's source, and the combined work (CVC4 linked with GMP) may (and do) remain
+under the more permissive CVC4 license.
-CVC4 can be optionally configured to link against CLN, the Class Library for
-Numbers, available here:
+Alternatively, CVC4 can be optionally configured to link against CLN, the Class
+Library for Numbers, available here:
http://www.ginac.de/CLN/
diff --git a/GMP-LICENSE b/GMP-LICENSE
index 3903d111e..bef2c0bf6 100644
--- a/GMP-LICENSE
+++ b/GMP-LICENSE
@@ -1,7 +1,12 @@
--------------------------------------------------------------------------------
-CVC4 links against The GNU Multiple Precision Arithmetic Library, licensed
-under GNU LGPL v3. In the following we include a copy of the GNU GPL v3 license
-and the GNU LGPL v3 as required by GNU LGPL v3.
+CVC4 can be (and is by default) configured to link against The GNU Multiple
+Precision (GMP) Arithmetic Library, licensed under GNU's Lesser General Public
+License (LGPL), version 3. Below, we include a copy of the GNU General Public
+License (GPL), version 3 followed by a copy of the GNU LGPL, version 3, as
+required by the LGPL. Note that according to the terms of the LGPL, both
+CVC4's source, and the combined work (CVC4 linked with GMP) may (and do) remain
+under the more permissive CVC4 license (see the COPYING file included with
+CVC4's distribution).
--------------------------------------------------------------------------------
GNU GENERAL PUBLIC LICENSE
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