avoid some overlong lines from posix urls, etc.

[gnulib.git] / m4 / getopt.m4

diff --git a/m4/getopt.m4 b/m4/getopt.m4
index 2cd7499..caa5df4 100644 (file)
--- a/m4/getopt.m4
+++ b/m4/getopt.m4
@@ -1,4 +1,4 @@
-# getopt.m4 serial 27
+# getopt.m4 serial 29
 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,
@@ -94,11 +94,15 @@ AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
   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.
+  dnl POSIX 2008 does not specify leading '+' behavior, but see
+  dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
+  dnl the next version of POSIX.  For now, we only guarantee leading '+'
+  dnl behavior with getopt-gnu.
   if test -z "$gl_replace_getopt"; then
     AC_CACHE_CHECK([whether getopt is POSIX compatible],
       [gl_cv_func_getopt_posix],
       [
-        dnl This test fails on mingw and succeeds on all other platforms.
+        dnl This test fails on mingw and succeeds on many other platforms.
         AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <unistd.h>
 #include <stdlib.h>
@@ -172,7 +176,7 @@ main ()
     if (!(optind == 1))
       return 12;
   }
-  /* Detect MacOS 10.5 bug.  */
+  /* Detect MacOS 10.5, AIX 7.1 bug.  */
   {
     char *argv[3] = { "program", "-ab", NULL };
     optind = OPTIND_MIN;
@@ -192,9 +196,9 @@ main ()
 ]])],
           [gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
           [case "$host_os" in
-             mingw*) gl_cv_func_getopt_posix="guessing no";;
-             darwin*) gl_cv_func_getopt_posix="guessing no";;
-             *)      gl_cv_func_getopt_posix="guessing yes";;
+             mingw*)         gl_cv_func_getopt_posix="guessing no";;
+             darwin* | aix*) gl_cv_func_getopt_posix="guessing no";;
+             *)              gl_cv_func_getopt_posix="guessing yes";;
            esac
           ])
       ])
@@ -254,6 +258,15 @@ main ()
                if (getopt (3, argv, "-p") != 'p')
                  return 7;
              }
+             /* This code fails on glibc 2.11.  */
+             {
+               char *argv[] = { "program", "-b", "-a", NULL };
+               optind = opterr = 0;
+               if (getopt (3, argv, "+:a:b") != 'b')
+                 return 8;
+               if (getopt (3, argv, "+:a:b") != ':')
+                 return 9;
+             }
              return 0;
            ]])],
         [gl_cv_func_getopt_gnu=yes],