Updated Geant4 and dependencies clhep and vecgeom to use cxxstd= variant (#10518)

* Updated Geant4 and dependencies clhep and vecgeom to use cxxstd= variant so that it is applied consistently.

* Make standalone geant4 data packages that are used when data is not installed with geant4. This allows installing the data files are externals that can be common to many compiler version.

* move geant4 data package dependencies to umbrella package geant4-data

17 files changed, 509 insertions, 50 deletions

diff --git a/var/spack/repos/builtin/packages/clhep/package.py b/var/spack/repos/builtin/packages/clhep/package.py
index 8dd1dd2b50..ebfe24ec6f 100644
--- a/var/spack/repos/builtin/packages/clhep/package.py
+++ b/var/spack/repos/builtin/packages/clhep/package.py
@@ -35,38 +35,26 @@ class Clhep(CMakePackage):
     version('2.2.0.5', sha256='92e8b5d32ae96154edd27d0c641ba048ad33cb69dd4f1cfb72fc578770a34818')
     version('2.2.0.4', sha256='9bf7fcd9892313c8d1436bc4a4a285a016c4f8e81e1fc65bdf6783207ae57550')
 
-    variant('cxx11', default=True, description="Compile using c++11 dialect.")
-    variant('cxx14', default=False, description="Compile using c++14 dialect.")
+    variant('cxxstd',
+            default='11',
+            values=('11', '14', '17'),
+            multi=False,
+            description='Use the specified C++ standard when building.')
+
+    conflicts('cxxstd=17', when='@:2.3.4.2')
 
     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')
 
+    root_cmakelists_dir = 'CLHEP'  # Extra directory layer.
+
     def patch(self):
         filter_file('SET CMP0042 OLD',
                     'SET CMP0042 NEW',
                     '%s/%s/CLHEP/CMakeLists.txt'
                     % (self.stage.path, self.spec.version))
 
-    root_cmakelists_dir = 'CLHEP'
-
     def cmake_args(self):
-        spec = self.spec
-        cmake_args = []
-
-        if '+cxx11' in spec:
-            if 'CXXFLAGS' in env and env['CXXFLAGS']:
-                env['CXXFLAGS'] += ' ' + self.compiler.cxx11_flag
-            else:
-                env['CXXFLAGS'] = self.compiler.cxx11_flag
-            cmake_args.append('-DCLHEP_BUILD_CXXSTD=' +
-                              self.compiler.cxx11_flag)
-
-        if '+cxx14' in spec:
-            if 'CXXFLAGS' in env and env['CXXFLAGS']:
-                env['CXXFLAGS'] += ' ' + self.compiler.cxx14_flag
-            else:
-                env['CXXFLAGS'] = self.compiler.cxx14_flag
-            cmake_args.append('-DCLHEP_BUILD_CXXSTD=' +
-                              self.compiler.cxx14_flag)
-
+        cmake_args = ['-DCLHEP_BUILD_CXXSTD=-std=c++{0}'.format(
+                      self.spec.variants['cxxstd'].value)]
         return cmake_args
diff --git a/var/spack/repos/builtin/packages/g4abla/package.py b/var/spack/repos/builtin/packages/g4abla/package.py
new file mode 100644
index 0000000000..3cca976376
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4abla/package.py
@@ -0,0 +1,27 @@
+# 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 *
+import os
+
+
+class G4abla(Package):
+    """Geant4 data for nuclear shell effects in INCL/ABLA hadronic mode"""
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4ABLA.3.0.tar.gz"
+
+    version('3.0', sha256='99fd4dcc9b4949778f14ed8364088e45fa4ff3148b3ea36f9f3103241d277014')
+    version('3.1', sha256='7698b052b58bf1b9886beacdbd6af607adc1e099fc730ab6b21cf7f090c027ed')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return ("http://geant4-data.web.cern.ch/geant4-data/datasets/G4ABLA.%s.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/g4emlow/package.py b/var/spack/repos/builtin/packages/g4emlow/package.py
new file mode 100644
index 0000000000..d4b88c8a0f
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4emlow/package.py
@@ -0,0 +1,27 @@
+# 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 *
+import os
+
+
+class G4emlow(Package):
+    """Geant4 data files for low energy electromagnetic processes."""
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4EMLOW.6.50.tar.gz"
+
+    version('6.50', sha256='c97be73fece5fb4f73c43e11c146b43f651c6991edd0edf8619c9452f8ab1236')
+    version('7.3', sha256='583aa7f34f67b09db7d566f904c54b21e95a9ac05b60e2bfb794efb569dba14e')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return ("http://geant4.web.cern.ch/support/source/G4EMLOW.%s.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/g4ensdfstate/package.py b/var/spack/repos/builtin/packages/g4ensdfstate/package.py
new file mode 100644
index 0000000000..ba2c370f25
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4ensdfstate/package.py
@@ -0,0 +1,30 @@
+# 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 *
+import os
+
+
+class G4ensdfstate(Package):
+    """Geant4 data for nuclides properties"""
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4ENSDFSTATE.2.1.tar.gz"
+
+    version('2.1', '933e7f99b1c70f24694d12d517dfca36d82f4e95b084c15d86756ace2a2790d9')
+    version('2.2', 'dd7e27ef62070734a4a709601f5b3bada6641b111eb7069344e4f99a01d6e0a6')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def setup_dependent_environment(self, spack_env, run_env, dependent_spec):
+        run_env.set('G4ENSDFSTATEDATA', join_path(prefix.share, 'data'))
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return "http://geant4-data.web.cern.ch/geant4-data/datasets/G4ENSDFSTATE.%s.tar.gz" % version
diff --git a/var/spack/repos/builtin/packages/g4ndl/package.py b/var/spack/repos/builtin/packages/g4ndl/package.py
new file mode 100644
index 0000000000..63cecd7fb7
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4ndl/package.py
@@ -0,0 +1,26 @@
+# 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 *
+import os
+
+
+class G4ndl(Package):
+    """Geant4 Neutron data files with thermal cross sections """
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4NDL.4.5.tar.gz"
+
+    version('4.5', 'cba928a520a788f2bc8229c7ef57f83d0934bb0c6a18c31ef05ef4865edcdf8e')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return ("http://geant4-data.web.cern.ch/geant4-data/datasets/G4NDL.%s.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/g4neutronxs/package.py b/var/spack/repos/builtin/packages/g4neutronxs/package.py
new file mode 100644
index 0000000000..f6b4c53193
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4neutronxs/package.py
@@ -0,0 +1,27 @@
+# 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 *
+import os
+
+
+class G4neutronxs(Package):
+    """Geant4 data for evaluated neutron cross-sections on natural composition
+       of elements"""
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4NEUTRONXS.1.4.tar.gz"
+
+    version('1.4', '57b38868d7eb060ddd65b26283402d4f161db76ed2169437c266105cca73a8fd')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return "http://geant4-data.web.cern.ch/geant4-data/datasets/G4NEUTRONXS.%s.tar.gz" % version
diff --git a/var/spack/repos/builtin/packages/g4photonevaporation/package.py b/var/spack/repos/builtin/packages/g4photonevaporation/package.py
new file mode 100644
index 0000000000..aed7c91a67
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4photonevaporation/package.py
@@ -0,0 +1,27 @@
+# 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 *
+import os
+
+
+class G4photonevaporation(Package):
+    """Geant4 data for photon evaporation"""
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4PhotonEvaporation.4.3.2.tar.gz"
+
+    version('4.3.2', 'd4641a6fe1c645ab2a7ecee09c34e5ea584fb10d63d2838248bfc487d34207c7')
+    version('5.2', '83607f8d36827b2a7fca19c9c336caffbebf61a359d0ef7cee44a8bcf3fc2d1f')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return ("http://geant4-data.web.cern.ch/geant4-data/datasets/G4PhotonEvaporation.%s.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/g4pii/package.py b/var/spack/repos/builtin/packages/g4pii/package.py
new file mode 100644
index 0000000000..b2c5d7806c
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4pii/package.py
@@ -0,0 +1,26 @@
+# 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 *
+import os
+
+
+class G4pii(Package):
+    """Geant4 data for shell ionisation cross-sections"""
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4PII.1.3.tar.gz"
+
+    version('1.3', '6225ad902675f4381c98c6ba25fc5a06ce87549aa979634d3d03491d6616e926')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return ("http://geant4-data.web.cern.ch/geant4-data/datasets/G4PII.1.3.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/g4radioactivedecay/package.py b/var/spack/repos/builtin/packages/g4radioactivedecay/package.py
new file mode 100644
index 0000000000..2b86faca5a
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4radioactivedecay/package.py
@@ -0,0 +1,27 @@
+# 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 *
+import os
+
+
+class G4radioactivedecay(Package):
+    """Geant4 data files for radio-active decay hadronic processes"""
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4RadioactiveDecay.5.1.1.tar.gz"
+
+    version('5.1.1', 'f7a9a0cc998f0d946359f2cb18d30dff1eabb7f3c578891111fc3641833870ae')
+    version('5.2', '99c038d89d70281316be15c3c98a66c5d0ca01ef575127b6a094063003e2af5d')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return ("http://geant4-data.web.cern.ch/geant4-data/datasets/G4RadioactiveDecay.%s.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/g4realsurface/package.py b/var/spack/repos/builtin/packages/g4realsurface/package.py
new file mode 100644
index 0000000000..a0594e0789
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4realsurface/package.py
@@ -0,0 +1,28 @@
+# 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 *
+import os
+
+
+class G4realsurface(Package):
+    """Geant4 data for measured optical surface reflectance"""
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/RealSurface.1.0.tar.gz"
+
+    version('1.0', '3e2d2506600d2780ed903f1f2681962e208039329347c58ba1916740679020b1')
+    version('2.1', '2a287adbda1c0292571edeae2082a65b7f7bd6cf2bf088432d1d6f889426dcf3')
+    version('2.1.1', '90481ff97a7c3fa792b7a2a21c9ed80a40e6be386e581a39950c844b2dd06f50')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return ("http://geant4-data.web.cern.ch/geant4-data/datasets/RealSurface.1.0.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/g4saiddata/package.py b/var/spack/repos/builtin/packages/g4saiddata/package.py
new file mode 100644
index 0000000000..83fd993bc8
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4saiddata/package.py
@@ -0,0 +1,26 @@
+# 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 *
+import os
+
+
+class G4saiddata(Package):
+    """Geant4 data from evaluated cross-sections in SAID data-base """
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4SAIDDATA.1.1.tar.gz"
+
+    version('1.1', 'a38cd9a83db62311922850fe609ecd250d36adf264a88e88c82ba82b7da0ed7f')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return "http://geant4-data.web.cern.ch/geant4-data/datasets/G4SAIDDATA.%s.tar.gz" % version
diff --git a/var/spack/repos/builtin/packages/g4tendl/package.py b/var/spack/repos/builtin/packages/g4tendl/package.py
new file mode 100644
index 0000000000..d02cee96d2
--- /dev/null
+++ b/var/spack/repos/builtin/packages/g4tendl/package.py
@@ -0,0 +1,27 @@
+# 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 *
+import os
+
+
+class G4tendl(Package):
+    """Geant4 data for incident particles [optional]"""
+    homepage = "http://geant4.web.cern.ch"
+    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4TENDL.1.3.tar.gz"
+
+    version('1.3', '52ad77515033a5d6f995c699809b464725a0e62099b5e55bf07c8bdd02cd3bce')
+    version('1.3.2', '3b2987c6e3bee74197e3bd39e25e1cc756bb866c26d21a70f647959fc7afb849')
+
+    def install(self, spec, prefix):
+        mkdirp(join_path(prefix.share, 'data'))
+        install_path = join_path(prefix.share, 'data',
+                                 os.path.basename(self.stage.source_path))
+        install_tree(self.stage.source_path, install_path)
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        return ("http://geant4-data.web.cern.ch/geant4-data/datasets/G4TENDL.%s.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/geant4-data/package.py b/var/spack/repos/builtin/packages/geant4-data/package.py
new file mode 100644
index 0000000000..d93b111434
--- /dev/null
+++ b/var/spack/repos/builtin/packages/geant4-data/package.py
@@ -0,0 +1,95 @@
+# 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 *
+import os
+import glob
+
+
+class Geant4Data(Package):
+    """An umbrella package to hold Geant4 data packages"""
+
+    homepage = "http://geant4.cern.ch"
+    url      = "http://geant4-data.web.cern.ch/geant4-data/ReleaseNotes/ReleaseNotes4.10.3.html"
+
+    version('10.03.p03', '2248ad436613897d9fad93bdb99d9446', expand=False)
+    version('10.04', 'c49194b96e65ed4527d34d22a9860972', expand=False)
+
+    # geant4@10.03.p03
+    depends_on("g4abla@3.0", when='@10.03.p03 ')
+    depends_on("g4emlow@6.50", when='@10.03.p03 ')
+    depends_on("g4ndl@4.5", when='@10.03.p03 ')
+    depends_on("g4neutronxs@1.4", when='@10.03.p03 ')
+    depends_on("g4saiddata@1.1", when='@10.03.p03 ')
+    depends_on("g4ensdfstate@2.1", when='@10.03.p03 ')
+    depends_on("g4photonevaporation@4.3.2", when='@10.03.p03 ')
+    depends_on("g4pii@1.3", when='@10.03.p03 ')
+    depends_on("g4radioactivedecay@5.1.1", when='@10.03.p03 ')
+    depends_on("g4realsurface@1.0", when='@10.03.p03 ')
+    depends_on("g4tendl@1.3", when='@10.03.p03 ')
+    # geant4@10.04
+    depends_on("g4abla@3.1", when='@10.04 ')
+    depends_on("g4emlow@7.3", when='@10.04 ')
+    depends_on("g4ndl@4.5", when='@10.04 ')
+    depends_on("g4neutronxs@1.4", when='@10.04 ')
+    depends_on("g4saiddata@1.1", when='@10.04 ')
+    depends_on("g4ensdfstate@2.2", when='@10.04 ')
+    depends_on("g4photonevaporation@5.2", when='@10.04 ')
+    depends_on("g4pii@1.3", when='@10.04 ')
+    depends_on("g4radioactivedecay@5.2", when='@10.04 ')
+    depends_on("g4realsurface@2.1", when='@10.04 ')
+    depends_on("g4tendl@1.3.2", when='@10.04 ')
+
+    def install(self, spec, prefix):
+        spec = self.spec
+        version = self.version
+        major = version[0]
+        minor = version[1]
+        if len(version) > 2:
+            patch = version[-1]
+        else:
+            patch = 0
+        data = 'Geant4-%s.%s.%s/data' % (major, minor, patch)
+        datadir = join_path(spec.prefix.share, data)
+        with working_dir(datadir, create=True):
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4abla'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4emlow'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4ndl'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4saiddata'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4neutronxs'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4ensdfstate'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4photonevaporation'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4pii'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4radioactivedecay'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4realsurface'].prefix):
+                os.symlink(d, os.path.basename(d))
+            for d in glob.glob('%s/share/data/*' %
+                               spec['g4tendl'].prefix):
+                os.symlink(d, os.path.basename(d))
+
+    def url_for_version(self, version):
+        """Handle version string."""
+        url = 'http://geant4-data.web.cern.ch/geant4-data/ReleaseNotes/'
+        url = url + 'ReleaseNotes4.{0}.{1}.html'.format(version[0], version[1])
+        return url
diff --git a/var/spack/repos/builtin/packages/geant4/cxx17.patch b/var/spack/repos/builtin/packages/geant4/cxx17.patch
new file mode 100644
index 0000000000..3845e9e20b
--- /dev/null
+++ b/var/spack/repos/builtin/packages/geant4/cxx17.patch
@@ -0,0 +1,22 @@
+diff -Naur geant4.10.03.p03/cmake/Modules/Geant4LibraryBuildOptions.cmake geant4.10.03.p03/cmake/Modules/Geant4LibraryBuildOptions.cmake
+--- geant4.10.03.p03/cmake/Modules/Geant4LibraryBuildOptions.cmake	2017-10-20 06:30:46.000000000 -0500
++++ geant4.10.03.p03/cmake/Modules/Geant4LibraryBuildOptions.cmake	2018-04-16 16:48:02.194321171 -0500
+@@ -76,7 +76,7 @@
+ # Mark as advanced because most users will not need it
+ enum_option(GEANT4_BUILD_CXXSTD
+   DOC "C++ Standard to compile against"
+-  VALUES 11 14 c++11 c++14
++  VALUES 11 14 17 c++11 c++14 c++17
+   CASE_INSENSITIVE
+   )
+ 
+@@ -106,6 +106,9 @@
+ 
+ # Add Definition to flags for temporary back compatibility
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DG4USE_STD11")
++if(GEANT4_BUILD_CXXSTD GREATER 14)
++  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES=1")
++endif()
+ 
+ # Hold any appropriate compile flag(s) in variable for later export to
+ # config files. Needed to support late CMake 2.8 where compile features
diff --git a/var/spack/repos/builtin/packages/geant4/cxx17_geant4_10_0.patch b/var/spack/repos/builtin/packages/geant4/cxx17_geant4_10_0.patch
new file mode 100644
index 0000000000..228985ebc4
--- /dev/null
+++ b/var/spack/repos/builtin/packages/geant4/cxx17_geant4_10_0.patch
@@ -0,0 +1,22 @@
+diff -Naur geant4/cmake/Modules/G4BuildSettings.cmake geant4/cmake/Modules/G4BuildSettings.cmake
+--- geant4/cmake/Modules/G4BuildSettings.cmake	2017-10-20 06:30:46.000000000 -0500
++++ geant4/cmake/Modules/G4BuildSettings.cmake	2018-04-16 16:48:02.194321171 -0500
+@@ -76,7 +76,7 @@
+ # Mark as advanced because most users will not need it
+ enum_option(GEANT4_BUILD_CXXSTD
+   DOC "C++ Standard to compile against"
+-  VALUES 11 14 c++11 c++14
++  VALUES 11 14 17 c++11 c++14 c++17
+   CASE_INSENSITIVE
+   )
+ 
+@@ -106,6 +106,9 @@
+ 
+ # Add Definition to flags for temporary back compatibility
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DG4USE_STD11")
++if(GEANT4_BUILD_CXXSTD GREATER 14)
++  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES=1")
++endif()
+ 
+ # Hold any appropriate compile flag(s) in variable for later export to
+ # config files. Needed to support late CMake 2.8 where compile features
diff --git a/var/spack/repos/builtin/packages/geant4/package.py b/var/spack/repos/builtin/packages/geant4/package.py
index 2f80498e3e..8846d4555d 100644
--- a/var/spack/repos/builtin/packages/geant4/package.py
+++ b/var/spack/repos/builtin/packages/geant4/package.py
@@ -6,6 +6,8 @@
 
 from spack import *
 import platform
+import os
+import glob
 
 
 class Geant4(CMakePackage):
@@ -19,49 +21,59 @@ class Geant4(CMakePackage):
 
     version('10.04', 'b84beeb756821d0c61f7c6c93a2b83de')
     version('10.03.p03', 'ccae9fd18e3908be78784dc207f2d73b')
-    version('10.02.p03', '2b887e66f0d41174016160707662a77b')
-    version('10.02.p02', '6aae1d0fc743b0edc358c5c8fbe48657')
-    version('10.02.p01', 'b81f7082a15f6a34b720b6f15c6289cfe4ddbbbdcef0dc52719f71fac95f7f1c')
-    version('10.01.p03', '4fb4175cc0dabcd517443fbdccd97439')
 
     variant('qt', default=False, description='Enable Qt support')
     variant('vecgeom', default=False, description='Enable vecgeom support')
-    variant('cxx11', default=True, description='Enable CXX11 support')
-    variant('cxx14', default=False, description='Enable CXX14 support')
     variant('opengl', default=False, description='Optional OpenGL support')
     variant('x11', default=False, description='Optional X11 support')
     variant('motif', default=False, description='Optional motif support')
     variant('threads', default=True, description='Build with multithreading')
+    variant('data', default=True, description='Install geant4 data')
 
-    depends_on('cmake@3.5:', type='build')
+    variant('cxxstd',
+            default='11',
+            values=('11', '14', '17'),
+            multi=False,
+            description='Use the specified C++ standard when building.')
 
-    conflicts('+cxx14', when='+cxx11')
-    conflicts('+cxx11', when='+cxx14')
+    depends_on('cmake@3.5:', type='build')
 
     # C++11 support
-    depends_on("clhep@2.4.0.0+cxx11~cxx14", when="@10.04+cxx11~cxx14")
-    depends_on("clhep@2.3.4.3+cxx11~cxx14", when="@10.03.p03+cxx11~cxx14")
-    depends_on("clhep@2.3.1.1+cxx11~cxx14", when="@10.02.p01+cxx11~cxx14")
-    depends_on("clhep@2.3.1.1+cxx11~cxx14", when="@10.02.p01+cxx11~cxx14")
-    depends_on("clhep@2.2.0.4+cxx11~cxx14", when="@10.01.p03+cxx11~cxx14")
+    depends_on("xerces-c cxxstd=11", when="cxxstd=11")
+    depends_on("clhep@2.4.0.0 cxxstd=11", when="@10.04 cxxstd=11")
+    depends_on("clhep@2.3.4.6 cxxstd=11", when="@10.03.p03 cxxstd=11")
+    depends_on("vecgeom cxxstd=11", when="+vecgeom cxxstd=11")
 
     # C++14 support
-    depends_on("clhep@2.4.0.0+cxx11~cxx14", when="@10.04~cxx11+cxx14")
-    depends_on("clhep@2.3.4.3+cxx11~cxx14", when="@10.03.p03~cxx11+cxx14")
-    depends_on("clhep@2.3.1.1~cxx11+cxx14", when="@10.02.p02~cxx11+cxx14")
-    depends_on("clhep@2.3.1.1~cxx11+cxx14", when="@10.02.p01~cxx11+cxx14")
-    depends_on("clhep@2.2.0.4~cxx11+cxx14", when="@10.01.p03~cxx11+cxx14")
+    depends_on("xerces-c cxxstd=14", when="cxxstd=14")
+    depends_on("clhep@2.4.0.0 cxxstd=14", when="@10.04 cxxstd=14")
+    depends_on("clhep@2.3.4.6 cxxstd=14", when="@10.03.p03 cxxstd=14")
+    depends_on("vecgeom cxxstd=14", when="+vecgeom cxxstd=14")
+
+    # C++17 support
+    depends_on("xerces-c cxxstd=17", when="cxxstd=17")
+    patch('cxx17.patch', when='@:10.03.p99 cxxstd=17')
+    patch('cxx17_geant4_10_0.patch', level=1, when='@10.04.00: cxxstd=17')
+    depends_on("clhep@2.4.0.0 cxxstd=17", when="@10.04 cxxstd=17")
+    depends_on("clhep@2.3.4.6 cxxstd=17", when="@10.03.p03 cxxstd=17")
+    depends_on("vecgeom cxxstd=17", when="+vecgeom cxxstd=17")
 
     depends_on("expat")
     depends_on("zlib")
-    depends_on("xerces-c")
     depends_on("mesa", when='+opengl')
     depends_on("libx11", when='+x11')
     depends_on("libxmu", when='+x11')
     depends_on("motif", when='+motif')
-    depends_on("vecgeom", when="+vecgeom")
     depends_on("qt@4.8:4.999", when="+qt")
 
+    # if G4 data not installed with geant4
+    # depend on G4 data packages
+    # this allows external data installations
+    # to avoid duplication
+
+    depends_on('geant4-data@10.03.p03', when='@10.03.p03 ~data')
+    depends_on('geant4-data@10.04', when='@10.04 ~data')
+
     def cmake_args(self):
         spec = self.spec
 
@@ -77,7 +89,7 @@ class Geant4(CMakePackage):
             spec['xerces-c'].prefix, ]
 
         arch = platform.system().lower()
-        if arch is not 'darwin':
+        if arch != 'darwin':
             if "+x11" in spec and "+opengl" in spec:
                 options.append('-DGEANT4_USE_OPENGL_X11=ON')
             if "+motif" in spec and "+opengl" in spec:
@@ -85,10 +97,8 @@ class Geant4(CMakePackage):
             if "+x11" in spec:
                 options.append('-DGEANT4_USE_RAYTRACER_X11=ON')
 
-        if '+cxx11' in spec:
-            options.append('-DGEANT4_BUILD_CXXSTD=c++11')
-        if '+cxx14' in spec:
-            options.append('-DGEANT4_BUILD_CXXSTD=c++14')
+        options.append('-DGEANT4_BUILD_CXXSTD=c++{0}'.format(
+                       self.spec.variants['cxxstd'].value))
 
         if '+qt' in spec:
             options.append('-DGEANT4_USE_QT=ON')
@@ -104,8 +114,32 @@ class Geant4(CMakePackage):
         on_or_off = lambda opt: 'ON' if '+' + opt in spec else 'OFF'
         options.append('-DGEANT4_BUILD_MULTITHREADED=' + on_or_off('threads'))
 
+        # install the data with geant4
+        options.append('-DGEANT4_INSTALL_DATA=' + on_or_off('data'))
+
         return options
 
     def url_for_version(self, version):
         """Handle Geant4's unusual version string."""
         return ("http://geant4.cern.ch/support/source/geant4.%s.tar.gz" % version)
+
+    @run_before('cmake')
+    def make_data_links(self):
+        if '+data' in self.spec:
+            return
+        spec = self.spec
+        version = self.version
+        major = version[0]
+        minor = version[1]
+        if len(version) > 2:
+            patch = version[-1]
+        else:
+            patch = 0
+        datadir = 'Geant4-%s.%s.%s/data' % (major, minor, patch)
+        with working_dir(join_path(spec.prefix.share, datadir),
+                         create=True):
+            dirs = glob.glob('%s/%s/*' %
+                             (spec['geant4-data'].prefix.share, datadir))
+            for d in dirs:
+                target = os.readlink(d)
+                os.symlink(target, os.path.basename(target))
diff --git a/var/spack/repos/builtin/packages/vecgeom/package.py b/var/spack/repos/builtin/packages/vecgeom/package.py
index f4a054d87b..15b4e25155 100644
--- a/var/spack/repos/builtin/packages/vecgeom/package.py
+++ b/var/spack/repos/builtin/packages/vecgeom/package.py
@@ -21,7 +21,7 @@ class Vecgeom(CMakePackage):
 
     variant('cxxstd',
             default='17',
-            values=('14', '17'),
+            values=('11', '14', '17'),
             multi=False,
             description='Use the specified C++ standard when building.')
     variant('vector',