getopt.c: Update to latest FSF version.

        * getopt.c: Update to latest FSF version.
        * getopt1.c: Likewise.
Bring over from devo.

From-SVN: r18169

libiberty/ChangeLog

+Thu Feb 12 16:29:49 1998  Ian Lance Taylor  <ian@cygnus.com>
+
+	* getopt.c: Update to latest FSF version.
+	* getopt1.c: Likewise.
+
 Fri Feb  6 01:35:17 1998  Manfred Hollstein  <manfred@s-direktnet.de>
 
 	* Makefile.in (FLAGS_TO_PASS): Don't pass PICFLAG.

libiberty/getopt1.c

 /* getopt_long and getopt_long_only entry points for GNU getopt.
-   Copyright (C) 1987, 88, 89, 90, 91, 92, 1993
-	Free Software Foundation, Inc.
+   Copyright (C) 1987,88,89,90,91,92,93,94,96,97 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License
-   as published by the Free Software Foundation; either version 2, or
-   (at your option) any later version.
+   NOTE: The canonical source of this file is maintained with the GNU C Library.
+   Bugs can be reported to bug-glibc@prep.ai.mit.edu.
+
+   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 2, 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 Library General Public License for more details.
+   GNU General Public License for more details.
 
-   You should have received a copy of the GNU Library General Public License
+   You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
-   Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+   USA.  */
 
 #ifdef HAVE_CONFIG_H
-#if defined (emacs) || defined (CONFIG_BROKETS)
-/* We use <config.h> instead of "config.h" so that a compilation
-   using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
-   (which it would do because it found this file in $srcdir).  */
 #include <config.h>
-#else
-#include "config.h"
-#endif
 #endif
 
 #include "getopt.h"
 
-#ifndef __STDC__
+#if !defined (__STDC__) || !__STDC__
 /* This is a separate conditional since some stdc systems
    reject `defined (const)'.  */
 #ifndef const
@@ -46,19 +42,22 @@
    (especially if it is a shared library).  Rather than having every GNU
    program understand `configure --with-gnu-libc' and omit the object files,
    it is simpler to just do this in the source for each such file.  */
-/* Many versions of the Linux C library include older, broken versions
-   of these routines, which will break the linker's command-line
-   parsing.  */
 
-#if defined (_LIBC) || !defined (__GNU_LIBRARY__) || defined (__linux__)
+#define GETOPT_INTERFACE_VERSION 2
+#if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
+#include <gnu-versions.h>
+#if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
+#define ELIDE_CODE
+#endif
+#endif
+
+#ifndef ELIDE_CODE
 
 
 /* This needs to come after some library #include
    to get __GNU_LIBRARY__ defined.  */
 #ifdef __GNU_LIBRARY__
 #include <stdlib.h>
-#else
-char *getenv ();
 #endif
 
 #ifndef	NULL
@@ -93,7 +92,7 @@ getopt_long_only (argc, argv, options, long_options, opt_index)
 }
 
 
-#endif	/* _LIBC or not __GNU_LIBRARY__.  */
+#endif	/* Not ELIDE_CODE.  */
 
 #ifdef TEST
 
@@ -124,7 +123,7 @@ main (argc, argv)
 
       c = getopt_long (argc, argv, "abc:d:0123456789",
 		       long_options, &option_index);
-      if (c == EOF)
+      if (c == -1)
 	break;
 
       switch (c)