Fix building latest version of flex (#2401)

* Fix building latest version of flex

* Don't need when clause

* Remove perl deps, shebang too long

var/spack/repos/builtin/packages/help2man/package.py

@@ -0,0 +1,37 @@
+##############################################################################
+# 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 Help2man(AutotoolsPackage):
+    """help2man produces simple manual pages from the '--help' and '--version'
+    output of other commands."""
+
+    homepage = "https://www.gnu.org/software/help2man/"
+    url      = "http://gnu.askapache.com/help2man/help2man-1.47.4.tar.xz"
+
+    version('1.47.4', '544aca496a7d89de3e5d99e56a2f03d3')
+
+    depends_on('gettext', type='build')