add slepc package

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

@@ -0,0 +1,49 @@
+import os
+from spack import *
+
+
+class Slepc(Package):
+    """
+    Scalable Library for Eigenvalue Computations.
+    """
+
+    homepage = "http://www.grycap.upv.es/slepc"
+    url = "http://slepc.upv.es/download/download.php?filename=slepc-3.6.2.tar.gz"
+
+    version('3.6.2', '2ab4311bed26ccf7771818665991b2ea3a9b15f97e29fd13911ab1293e8e65df')
+
+    variant('arpack', default=False, description='Enables Arpack wrappers')
+
+    depends_on('petsc')
+    depends_on('arpack-ng~mpi',when='+arpack^petsc~mpi')
+    depends_on('arpack-ng+mpi',when='+arpack^petsc+mpi')
+
+    def install(self, spec, prefix):
+        # set SLEPC_DIR for installation
+        os.environ['SLEPC_DIR'] = self.stage.source_path
+
+        options = []
+
+        if '+arpack' in spec:
+            options.extend([
+                '--with-arpack-dir=%s' % spec['arpack-ng'].prefix.lib,
+            ])
+            if 'arpack-ng~mpi' in spec:
+                options.extend([
+                    '--with-arpack-flags=-larpack'
+                ])
+            else:
+                options.extend([
+                    '--with-arpack-flags=-lparpack,-larpack'
+                ])
+
+        configure('--prefix=%s' % prefix, *options)
+
+        make('MAKE_NP=%s' % make_jobs, parallel=False)
+        #FIXME:
+        # make('test')
+        make('install')
+
+    def setup_dependent_environment(self, spack_env, run_env, dependent_spec):
+        # set up SLEPC_DIR for everyone using SLEPc package
+        spack_env.set('SLEPC_DIR', self.prefix)