a few package used in HEP including ROOT6

var/spack/repos/builtin/packages/clhep/darwin/CLHEP.patch

@@ -0,0 +1,11 @@
+--- CLHEP/CMakeLists.txt	2016-06-20 14:41:12.000000000 -0500
++++ CLHEP/CMakeLists.txt	2016-06-20 14:40:57.000000000 -0500
+@@ -37,7 +37,7 @@
+ # If Policy CMP0042 exists, use OLD to prefer the use of install names
+ # instead of the new @rpath default. 
+ if(POLICY CMP0042)
+-  cmake_policy(SET CMP0042 NEW)
++  cmake_policy(SET CMP0042 OLD)
+ endif()
+ 
+ set(CMAKE_MODULE_PATH 

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

@@ -0,0 +1,81 @@
+##############################################################################
+# Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://github.com/llnl/spack
+# Please also see the LICENSE file for our notice and the LGPL.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License (as
+# published by the Free Software Foundation) version 2.1, February 1999.
+#
+# 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 terms and
+# conditions of the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+
+from spack import *
+
+
+class Clhep(Package):
+    """CLHEP is a C++ Class Library for High Energy Physics. """
+    homepage = "http://proj-clhep.web.cern.ch/proj-clhep/"
+    url      = "http://proj-clhep.web.cern.ch/proj-clhep/DISTRIBUTION/tarFiles/clhep-2.2.0.5.tgz"
+    list_url = "https://proj-clhep.web.cern.ch/proj-clhep/DISTRIBUTION/"
+
+    version('2.3.2.2', '567b304b0fa017e1e9fbf199f456ebe9')
+    version('2.3.1.1', '16efca7641bc118c9d217cc96fe90bf5')
+    version('2.3.1.0', 'b084934fc26a4182a08c09c292e19161')
+    version('2.3.0.0', 'a00399a2ca867f2be902c22fc71d7e2e')
+    version('2.2.0.8', '5a23ed3af785ac100a25f6cb791846af')
+    version('2.2.0.5', '1584e8ce6ebf395821aed377df315c7c')
+    version('2.2.0.4', '71d2c7c2e39d86a0262e555148de01c1')
+
+    variant('debug', default=False, description="Switch to the debug version of CLHEP.")
+    variant('cxx11', default=True, description="Compile using c++11 dialect.")
+    variant('cxx14', default=False, description="Compile using c++14 dialect.")
+
+    depends_on('cmake@2.8.12.2:', when='@2.2.0.4:2.3.0.0', type='build')
+    depends_on('cmake@3.2:', when='@2.3.0.1:', type='build')
+
+    def patch(self):
+        filter_file('SET CMP0042 OLD',
+                    'SET CMP0042 NEW',
+                    '%s/%s/CLHEP/CMakeLists.txt'
+                    % (self.stage.path, self.spec.version))
+
+    def install(self, spec, prefix):
+        # Handle debug
+        # Pull out the BUILD_TYPE so we can change it (Release is default)
+        cmake_args = [arg for arg in std_cmake_args if 'BUILD_TYPE' not in arg]
+        build_type = 'Debug' if '+debug' in spec else 'MinSizeRel'
+        cmake_args.extend(['-DCMAKE_BUILD_TYPE=' + build_type])
+
+        if '+cxx11' in spec:
+            env['CXXFLAGS'] = self.compiler.cxx11_flag
+            cmake_args.append('-DCLHEP_BUILD_CXXSTD=' +
+                              self.compiler.cxx11_flag)
+
+        if '+cxx14' in spec:
+            env['CXXFLAGS'] = self.compiler.cxx14_flag
+            cmake_args.append('-DCLHEP_BUILD_CXXSTD=' +
+                              self.compiler.cxx14_flag)
+
+        # Note that the tar file is unusual in that there's a
+        # CLHEP directory (addtional layer)
+        cmake_args.append("../CLHEP")
+
+        # Run cmake in a build directory
+        with working_dir('build', create=True):
+            cmake(*cmake_args)
+            make()
+            make("install")