A set of tools used in climate modeling and numerical weather prediction. (#1317)

* Update grib-api: switched to cmake building system.

* Update harfbuzz: added pkg-config dependency.

* Update pango: added pkg-config dependency.

* Add libemos package.

* Add Magics (from ECMWF) package.

* Revert "Variant for building cdo without mpi (#1638)":
CDO does not use MPI.

This reverts commit 079d063c6d.

* Update CDO package: full featured implementation.

* Update magics: added python as build dependency.

* Update cdo: added disabling configuration options.

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

@@ -0,0 +1,52 @@
+##############################################################################
+# 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 Libemos(Package):
+    """The Interpolation library (EMOSLIB) includes Interpolation software and
+       BUFR & CREX encoding/decoding routines."""
+
+    homepage = "https://software.ecmwf.int/wiki/display/EMOS/Emoslib"
+    url      = "https://software.ecmwf.int/wiki/download/attachments/3473472/libemos-4.4.2-Source.tar.gz"
+
+    version('4.4.2', 'f15a9aff0f40861f3f046c9088197376')
+
+    depends_on('cmake', type='build')
+    depends_on('grib-api')
+
+    def install(self, spec, prefix):
+        options = []
+        options.extend(std_cmake_args)
+
+        options.append('-DGRIB_API_PATH=%s' % spec['grib_api'].prefix)
+
+        # To support long pathnames that spack generates
+        options.append('-DCMAKE_Fortran_FLAGS=-ffree-line-length-none')
+
+        with working_dir('spack-build', create=True):
+            cmake('..', *options)
+            make()
+            make('install')