unifdef: added new package (#14880)

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

@@ -0,0 +1,25 @@
+# Copyright 2013-2020 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 Unifdef(MakefilePackage):
+    """The unifdef utility selectively processes conditional C preprocessor #if
+    and #ifdef directives. It removes from a file both the directives and the
+    additional text that they delimit, while otherwise leaving the file
+    alone."""
+
+    homepage = "https://dotat.at/prog/unifdef/"
+    url      = "https://dotat.at/prog/unifdef/unifdef-2.11.tar.xz"
+
+    maintainers = ['matthiasdiener']
+
+    version('2.11', sha256='828ffc270ac262b88fe011136acef2780c05b0dc3c5435d005651740788d4537')
+
+    def edit(self, spec, prefix):
+        makefile = FileFilter('Makefile')
+        makefile.filter(r'\$\{HOME\}', prefix)