diff --git a/lib/spack/spack/compilers/cray.py b/lib/spack/spack/compilers/cray.py
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+++ b/lib/spack/spack/compilers/cray.py
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+##############################################################################
+# Copyright (c) 2013, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Written by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://scalability-llnl.github.io/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 General Public License (as published by
+# the Free Software Foundation) version 2.1 dated 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 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
+##############################################################################
+import llnl.util.tty as tty
+from spack.compiler import *
+from spack.version import ver
+
+class Cray(Compiler):
+    # Subclasses use possible names of C compiler
+    cc_names = ['cc']
+
+    # Subclasses use possible names of C++ compiler
+    cxx_names = ['CC']
+
+    # Subclasses use possible names of Fortran 77 compiler
+    f77_names = ['ftn']
+
+    # Subclasses use possible names of Fortran 90 compiler
+    fc_names = ['ftn']
+
+    # MacPorts builds gcc versions with prefixes and -mp-X.Y suffixes.
+    suffixes = [r'-mp-\d\.\d']
+
+    PrgEnv = 'PrgEnv-cray'
+    PrgEnv_compiler = 'craype'
+
+    @property
+    def cxx11_flag(self):
+        return "-hstd=c++11"