erne: new package starting at 2.1.1 (#9676)

* erne: new package starting at 2.1.1

* erne: remove unused configure args

* erne: remove unused prefix arg

* erne: add explicit mpi disable

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

@@ -0,0 +1,36 @@
+# Copyright 2013-2018 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 *
+
+
+class Erne(AutotoolsPackage):
+    """The Extended Randomized Numerical alignEr using BWT"""
+
+    homepage = "http://erne.sourceforge.net/"
+    url      = "https://downloads.sourceforge.net/project/erne/2.1.1/erne-2.1.1-source.tar.gz"
+
+    version('2.1.1', sha256='f32ab48481fd6c129b0a0246ab02b6e3a2a9da84024e1349510a59c15425d983')
+
+    variant('mpi', default=False,
+            description='Build with OpenMPI support')
+
+    depends_on('boost@1.40.0:', type=('build', 'link', 'run'))
+    depends_on('openmpi', type=('build', 'run'), when='+mpi')
+
+    def configure_args(self):
+        if '+mpi' in self.spec:
+            return ['--enable-openmpi']
+        else:
+            return ['--disable-openmpi']
+
+    def build(self, spec, prefix):
+        # override the AUTOCONF environment to prevent double configure
+        # this catches any invocations and ignores them
+        make('AUTOCONF=:')
+
+    def install(self, spec, prefix):
+        # same catch with installing
+        make('install', 'AUTOCONF=:')