Import gnulib argp module.

* gnulib/argp-ba.c: New file.
	* gnulib/argp-eexst.c: Likewise.
	* gnulib/argp-fmtstream.c: Likewise.
	* gnulib/argp-fmtstream.h: Likewise.
	* gnulib/argp-fs-xinl.c: Likewise.
	* gnulib/argp-help.c: Likewise.
	* gnulib/argp-namefrob.h: Likewise.
	* gnulib/argp-parse.c: Likewise.
	* gnulib/argp-pin.c: Likewise.
	* gnulib/argp-pv.c: Likewise.
	* gnulib/argp-pvh.c: Likewise.
	* gnulib/argp-version-etc.c: Likewise.
	* gnulib/argp-version-etc.h: Likewise.
	* gnulib/argp-xinl.c: Likewise.
	* gnulib/argp.h: Likewise.

gnulib/argp-version-etc.c

@@ -0,0 +1,38 @@
+/* Version hook for Argp.
+   Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   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
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+#include <version-etc.h>
+#include <argp.h>
+#include <argp-version-etc.h>
+
+static const char *program_canonical_name;
+static const char * const *program_authors;
+
+static void
+version_etc_hook (FILE *stream, struct argp_state *state)
+{
+  version_etc_ar (stream, program_canonical_name, PACKAGE_NAME, VERSION,
+                  program_authors);
+}
+
+void
+argp_version_setup (const char *name, const char * const *authors)
+{
+  argp_program_version_hook = version_etc_hook;
+  program_canonical_name = name;
+  program_authors = authors;
+}