New package libaec: a BSD-licensed replacement for the szip library. (#4437)

* Added package for 'libaec'.

* New version for package 'libaec'.

etc/spack/defaults/packages.yaml

@@ -31,3 +31,4 @@ packages:
       openfoam: [openfoam-com, openfoam-org, foam-extend]
       pil: [py-pillow]
       scalapack: [netlib-scalapack]
+      szip: [libszip, libaec]

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

@@ -0,0 +1,42 @@
+##############################################################################
+# 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 Libaec(CMakePackage):
+    """Libaec provides fast lossless compression of 1 up to 32 bit wide signed
+       or unsigned integers (samples). It implements Golomb-Rice compression
+       method under the BSD license and includes a free drop-in replacement for
+       the SZIP library."""
+
+    homepage = 'https://gitlab.dkrz.de/k202009/libaec'
+
+    # We provide per version urls.
+    url = 'https://gitlab.dkrz.de/k202009/libaec/uploads/'
+
+    provides('szip')
+
+    version('1.0.1', 'cdf70e2b8f9153ee644710bb441f9e1e', url=url + '926fe2b181865e38a236ad12bf053cfa/libaec-1.0.1.tar.gz')
+    version('1.0.0', 'a848b4e397ed210313183a5e92592e42', url=url + '631e85bcf877c2dcaca9b2e6d6526339/libaec-1.0.0.tar.gz')

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

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class Szip(AutotoolsPackage):
+class Libszip(AutotoolsPackage):
     """Szip is an implementation of the extended-Rice lossless
      compression algorithm.
 
@@ -38,6 +38,8 @@ class Szip(AutotoolsPackage):
     list_url = "https://support.hdfgroup.org/ftp/lib-external/szip"
     list_depth = 2
 
+    provides('szip')
+
     version('2.1.1', 'dd579cf0f26d44afd10a0ad7291fc282')
     version('2.1',   '902f831bcefb69c6b635374424acbead')