X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/1853982561f87a729024577156def20433035946..f7737e2e16cb9a49c258ac4b82b2b5f4fa9d0f18:/lib/getopt.h

diff --git a/lib/getopt.h b/lib/getopt.h
index ac6728f8..cc701940 100644
--- a/lib/getopt.h
+++ b/lib/getopt.h
@@ -1,11 +1,14 @@
 /* Declarations for getopt.
-   Copyright (C) 1989,90,91,92,93,94,96,97,98 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
-   Free Software Foundation; either version 2, or (at your option) any
-   later version.
+
+   Copyright (C) 1989-1994, 1996-1999, 2001, 2002 Free Software Foundation,
+   Inc.
+
+   This file is part of the GNU C Library.
+
+   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
@@ -13,9 +16,8 @@
    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, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-   USA.  */
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
 #ifndef _GETOPT_H
 
@@ -23,6 +25,22 @@
 # define _GETOPT_H 1
 #endif
 
+/* If __GNU_LIBRARY__ is not already defined, either we are being used
+   standalone, or this is the first header included in the source file.
+   If we are being used with glibc, we need to include <features.h>, but
+   that does not exist if we are standalone.  So: if __GNU_LIBRARY__ is
+   not defined, include <stdlib.h>, which will pull in <features.h> for us
+   if it's from glibc (and will declare getopt).  Fall back on <ctype.h> if
+   <stdlib.h> might not exist.  (Why ctype.h?  It's guaranteed to exist and it
+   doesn't flood the namespace with stuff the way some other headers do.)  */
+#if !defined __GNU_LIBRARY__
+# if HAVE_STDLIB_H || STDC_HEADERS
+#  include <stdlib.h>
+# else
+#  include <ctype.h>
+# endif
+#endif
+
 #ifdef	__cplusplus
 extern "C" {
 #endif
@@ -82,7 +100,7 @@ extern int optopt;
 
 struct option
 {
-# if defined __STDC__ && __STDC__
+# if (defined __STDC__ && __STDC__) || defined __cplusplus
   const char *name;
 # else
   char *name;
@@ -126,15 +144,17 @@ struct option
    arguments to the option '\0'.  This behavior is specific to the GNU
    `getopt'.  */
 
-#if defined __STDC__ && __STDC__
-# ifdef __GNU_LIBRARY__
+#if (defined __STDC__ && __STDC__) || defined __cplusplus
+# if defined HAVE_DECL_GETOPT && !HAVE_DECL_GETOPT
+#  ifdef __GNU_LIBRARY__
 /* Many other libraries have conflicting prototypes for getopt, with
    differences in the consts, in stdlib.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 /* not __GNU_LIBRARY__ */
 extern int getopt ();
-# endif /* __GNU_LIBRARY__ */
+#  endif /* __GNU_LIBRARY__ */
+# endif /* defined HAVE_DECL_GETOPT && !HAVE_DECL_GETOPT */
 
 # ifndef __need_getopt
 extern int getopt_long (int __argc, char *const *__argv, const char *__shortopts,