Add elk package

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

@@ -0,0 +1,18 @@
+from spack import *
+
+class Libxc(Package):
+    """Libxc is a library of exchange-correlation functionals for
+    density-functional theory."""
+
+    homepage = "http://www.tddft.org/programs/octopus/wiki/index.php/Libxc"
+    url      = "http://www.tddft.org/programs/octopus/down.php?file=libxc/libxc-2.2.2.tar.gz"
+
+    version('2.2.2', 'd9f90a0d6e36df6c1312b6422280f2ec')
+
+
+    def install(self, spec, prefix):
+        configure('--prefix=%s' % prefix,
+                  '--enable-shared')
+
+        make()
+        make("install")