feat: Add gecode package (and add it to visionary-dls-core)

* to be used for CSP-based routing and mapping

Change-Id: If94e7af63c86100dfbb6472995f95cc83e64efd2

var/spack/repos/builtin/packages/gecode/package.py

@@ -0,0 +1,20 @@
+# Copyright 2013-2021 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 Gecode(AutotoolsPackage):
+    """Generic constraint development environment."""
+
+    homepage = "https://www.gecode.org"
+    url      = "https://github.com/Gecode/gecode/archive/release-6.2.0.tar.gz"
+
+    version('6.2.0', sha256='27d91721a690db1e96fa9bb97cec0d73a937e9dc8062c3327f8a4ccb08e951fd')
+
+    depends_on('m4',       type='build')
+    depends_on('autoconf', type='build')
+    depends_on('automake', type='build')
+    depends_on('libtool',  type='build')

var/spack/repos/builtin/packages/visionary-dls-core/package.py

@@ -30,6 +30,7 @@ class VisionaryDlsCore(Package):
     depends_on('cereal')
     depends_on('cppcheck')
     depends_on('doxygen+graphviz')
+    depends_on('gecode')
     depends_on('genpybind')
     depends_on('gflags')
     depends_on('googletest@1.11.0:+gmock')