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.h

@@ -0,0 +1,40 @@
+/* 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/>.  */
+
+#ifndef _ARGP_VERSION_ETC_H
+#define _ARGP_VERSION_ETC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Setup standard display of the version information for the `--version'
+   option.  NAME is the canonical program name, and AUTHORS is a NULL-
+   terminated array of author names. At least one author name must be
+   given.
+
+   If NAME is NULL, the package name (as given by the PACKAGE macro)
+   is asumed to be the name of the program.
+
+   This function is intended to be called before argp_parse().
+*/
+extern void argp_version_setup (const char *name, const char * const *authors);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ARGP_VERSION_ETC_H */