maint: remove useless inclusions of "alloca.h"

[gnulib.git] / m4 / getopt.m4

diff --git a/m4/getopt.m4 b/m4/getopt.m4
index 264b57f..a19805e 100644 (file)
--- a/m4/getopt.m4
+++ b/m4/getopt.m4
@@ -1,5 +1,5 @@
 # getopt.m4 serial 24
-dnl Copyright (C) 2002-2006, 2008-2009 Free Software Foundation, Inc.
+dnl Copyright (C) 2002-2006, 2008-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -88,6 +88,7 @@ AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
   dnl strings starts with '+' and it's not the first call.  Some internal state
   dnl is left over from earlier calls, and neither setting optind = 0 nor
   dnl setting optreset = 1 get rid of this internal state.
+  dnl POSIX is silent on optind vs. optreset, so we allow either behavior.
   if test -z "$gl_replace_getopt"; then
     AC_CACHE_CHECK([whether getopt is POSIX compatible],
       [gl_cv_func_getopt_posix],
@@ -187,18 +188,14 @@ main ()
       [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
        # optstring is necessary for programs like m4 that have POSIX-mandated
        # semantics for supporting options interspersed with files.
+       # Also, since getopt_long is a GNU extension, we require optind=0.
        gl_had_POSIXLY_CORRECT=${POSIXLY_CORRECT:+yes}
        POSIXLY_CORRECT=1
        export POSIXLY_CORRECT
        AC_RUN_IFELSE(
-       [AC_LANG_PROGRAM([[#include <getopt.h>
-                          #include <stddef.h>
-                          #include <string.h>
-#if !HAVE_DECL_OPTRESET
-# define OPTIND_MIN 0
-#else
-# define OPTIND_MIN (optreset = 1)
-#endif
+        [AC_LANG_PROGRAM([[#include <getopt.h>
+                           #include <stddef.h>
+                           #include <string.h>
            ]], [[
              /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
                 and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
@@ -231,17 +228,17 @@ main ()
              /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0.  */
              {
                char *argv[] = { "program", "foo", "-p", NULL };
-               optind = OPTIND_MIN;
+               optind = 0;
                if (getopt (3, argv, "-p") != 1)
                  return 6;
                if (getopt (3, argv, "-p") != 'p')
                  return 7;
              }
              return 0;
-          ]])],
-       [gl_cv_func_getopt_gnu=yes],
-       [gl_cv_func_getopt_gnu=no],
-       [dnl Cross compiling. Guess based on host and declarations.
+           ]])],
+        [gl_cv_func_getopt_gnu=yes],
+        [gl_cv_func_getopt_gnu=no],
+        [dnl Cross compiling. Guess based on host and declarations.
          case $host_os:$ac_cv_have_decl_optreset in
            *-gnu*:* | mingw*:*) gl_cv_func_getopt_gnu=no;;
            *:yes)               gl_cv_func_getopt_gnu=no;;