/* Declarations for getopt.
- Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
+ Copyright (C) 1989-2019 Free Software Foundation, Inc.
+
+ NOTE: The canonical source of this file is maintained with the GNU C Library.
+ Bugs can be reported to bug-glibc@gnu.org.
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
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
+ USA. */
#ifndef _GETOPT_H
#define _GETOPT_H 1
On entry to `getopt', zero means this is the first call; initialize.
- When `getopt' returns EOF, this is the index of the first of the
+ When `getopt' returns -1, this is the index of the first of the
non-option elements that the caller should itself scan.
Otherwise, `optind' communicates from one call to the next
struct option
{
-#if __STDC__
+#if defined (__STDC__) && __STDC__
const char *name;
#else
char *name;
#define required_argument 1
#define optional_argument 2
-#if __STDC__
-#if defined(__GNU_LIBRARY__)
+#if defined (__STDC__) && __STDC__
+/* HAVE_DECL_* is a three-state macro: undefined, 0 or 1. If it is
+ undefined, we haven't run the autoconf check so provide the
+ declaration without arguments. If it is 0, we checked and failed
+ to find the declaration so provide a fully prototyped one. If it
+ is 1, we found it so don't provide any declaration at all. */
+#if !HAVE_DECL_GETOPT
+#if defined (__GNU_LIBRARY__) || defined (HAVE_DECL_GETOPT)
/* Many other libraries have conflicting prototypes for getopt, with
- differences in the consts, in stdlib.h. To avoid compilation
+ differences in the consts, in unistd.h. To avoid compilation
errors, only prototype getopt for the GNU C library. */
extern int getopt (int argc, char *const *argv, const char *shortopts);
-#else /* not __GNU_LIBRARY__ */
+#else
+#ifndef __cplusplus
extern int getopt ();
-#endif /* not __GNU_LIBRARY__ */
+#endif /* __cplusplus */
+#endif
+#endif /* !HAVE_DECL_GETOPT */
+
extern int getopt_long (int argc, char *const *argv, const char *shortopts,
const struct option *longopts, int *longind);
extern int getopt_long_only (int argc, char *const *argv,
extern int getopt_long_only ();
extern int _getopt_internal ();
-#endif /* not __STDC__ */
+#endif /* __STDC__ */
#ifdef __cplusplus
}
#endif
-#endif /* _GETOPT_H */
+#endif /* getopt.h */