diff --git a/var/spack/repos/builtin/packages/cln/package.py b/var/spack/repos/builtin/packages/cln/package.py
new file mode 100644
index 0000000000..0ead23d3f2
--- /dev/null
+++ b/var/spack/repos/builtin/packages/cln/package.py
@@ -0,0 +1,31 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+
+from spack import *
+
+
+class Cln(AutotoolsPackage):
+    """CLN is a library for efficient computations with all kinds of numbers
+    in arbitrary precision. It features number classes for unlimited length
+    integers, rationals, arbitrary precision floating point numbers and much
+    more."""
+
+    homepage = "https://www.ginac.de/CLN/"
+    git = "git://www.ginac.de/cln.git"
+
+    version('1.3.4', commit='9b86a7fc69feb1b288469982001af565f73057eb')
+    version('1.3.3', commit='1c9bd61ff0b89b0bf8030e44cb398e8f75112222')
+    version('1.3.2', commit='00817f7b60a961b860f6d305ac82dd51b70d6ba6')
+    version('1.3.1', commit='196fee3778494b69063f2a1b018e70de351b336f')
+    version('1.3.0', commit='8e19c1a9d9ea4116112490d6f43904258b928649')
+    version('1.2.2', commit='cd3ea9b9889856c6b54266fdb13b54dd3c53931a')
+    version('1.2.1', commit='567378ab4cbfd443c3d82d810599860c769251fe')
+    version('1.2.0', commit='679a0a8927f011fb32411f8a31070c77a9901094')
+
+    depends_on('autoconf', type='build')
+    depends_on('automake', type='build')
+    depends_on('libtool',  type='build')
+    depends_on('m4',       type='build')