According to POSIX, <unistd.h> should declare optarg, optind, etc. But on
Solaris, the system header does this only if __EXTENSIONS__ is defined.
This makes its use in gnulib automatic:
2009-08-12 Bruno Haible <br...@clisp.org>
Ensure that optarg etc. get declared by <unistd.h>.
* m4/getopt.m4 (gl_GETOPT_CHECK_HEADERS): Require
AC_USE_SYSTEM_EXTENSIONS.
* modules/getopt (Depends-on): Add 'extensions'.
--- m4/getopt.m4.orig 2009-08-13 01:07:50.000000000 +0200
+++ m4/getopt.m4 2009-08-13 01:07:32.000000000 +0200
@@ -1,4 +1,4 @@
-# getopt.m4 serial 19
+# getopt.m4 serial 20
dnl Copyright (C) 2002-2006, 2008-2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -41,6 +41,9 @@
# Determine whether to replace the entire getopt facility.
AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
[
+ dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
gl_replace_getopt=
if test -z "$gl_replace_getopt"; then
AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
--- modules/getopt.orig 2009-08-13 01:07:50.000000000 +0200
+++ modules/getopt 2009-08-13 01:01:34.000000000 +0200
@@ -11,6 +11,7 @@
Depends-on:
gettext-h
unistd
+extensions
configure.ac:
gl_GETOPT
