From 28d95f84b62d2c00b475d0204bfac7d77d679586 Mon Sep 17 00:00:00 2001
From: Morgan Deters <mdeters@cs.nyu.edu>
Date: Wed, 18 Dec 2013 12:23:24 -0500
Subject: [PATCH] Fix an autoconf issue with CLN in some configurations; also
 clarification re: license issues

[skip ci]
---
 configure.ac | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index a9177fbc5..6e51951f4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -298,6 +298,8 @@ if test $cvc4_use_cln != 0; then
   # we have to have PKG_CHECK_MODULES _exactly_ once in configure.ac !
   PKG_CHECK_MODULES([CLN], [cln >= 1.2.2],
     [AC_LANG_PUSH([C++])
+     save_LIBS="$LIBS"
+     LIBS="$CLN_LIBS $LIBS"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <cln/cln.h>]], [[cln::cl_F pi = "3.1415926";]])], [
        cvc4_use_cln=1
      ], [
@@ -311,6 +313,7 @@ if test $cvc4_use_cln != 0; then
          cvc4_use_gmp=1
        fi
      ])
+     LIBS="$save_LIBS"
      AC_LANG_POP([C++])
     ],
     [if test $cvc4_use_cln = 1; then
@@ -1357,7 +1360,7 @@ Please note that CVC4 will be built against the following GPLed libraries:
 As these libraries are covered under the GPLv3, so is this build of CVC4.
 CVC4 is also available to you under the terms of the (modified) BSD license.
 If you prefer to license CVC4 under those terms, please configure with the
-option "--bsd".
+option "--bsd", which will disable all optional GPLed library dependences.
 ****************************************************************************
 
 '
-- 
2.30.2