| dnl SPDX-License-Identifier: FSFULLR |
| |
| # getopt.m4 serial 49 (modified version) |
| dnl Copyright (C) 2002-2006, 2008-2023 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. |
| |
| # This version has been modified to reduce complexity since we only need |
| # GNU getopt_long and do not care about replacing getopt. |
| |
| # Check for a POSIX compliant getopt function with GNU extensions (such as |
| # options with optional arguments) and the functions getopt_long, |
| # getopt_long_only. |
| AC_DEFUN([gl_FUNC_GETOPT_GNU], |
| [ |
| AC_REQUIRE([gl_GETOPT_CHECK_HEADERS]) |
| |
| if test -n "$gl_replace_getopt"; then |
| gl_GETOPT_SUBSTITUTE |
| fi |
| ]) |
| |
| AC_DEFUN([gl_GETOPT_CHECK_HEADERS], |
| [ |
| gl_replace_getopt= |
| |
| if test -z "$gl_replace_getopt"; then |
| AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes]) |
| fi |
| |
| if test -z "$gl_replace_getopt"; then |
| AC_CHECK_FUNCS([getopt_long], [], [gl_replace_getopt=yes]) |
| fi |
| |
| dnl BSD getopt_long uses a way to reset option processing, that is different |
| dnl from GNU and Solaris (which copied the GNU behavior). We support both |
| dnl GNU and BSD style resetting of getopt_long(), so there's no need to use |
| dnl GNU getopt_long() on BSD due to different resetting style. |
| if test -z "$gl_replace_getopt"; then |
| AC_CHECK_DECL([optreset], |
| [AC_DEFINE([HAVE_OPTRESET], 1, |
| [Define to 1 if getopt.h declares extern int optreset.])], |
| [], [#include <getopt.h>]) |
| fi |
| |
| 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. We don't use that feature, so this |
| dnl is not a problem for us. Thus, the respective test was removed here. |
| |
| dnl Checks for getopt handling '-' as a leading character in an option |
| dnl string were removed, since we also don't use that feature. |
| |
| ]) |
| |
| AC_DEFUN([gl_GETOPT_SUBSTITUTE], |
| [ |
| AC_LIBOBJ([getopt]) |
| AC_LIBOBJ([getopt1]) |
| |
| AC_CHECK_HEADERS_ONCE([sys/cdefs.h]) |
| |
| AC_DEFINE([__GETOPT_PREFIX], [[rpl_]], |
| [Define to rpl_ if the getopt replacement functions and variables |
| should be used.]) |
| |
| GETOPT_H=getopt.h |
| AC_SUBST([GETOPT_H]) |
| ]) |
| |
| AC_DEFUN([gl_GETOPT], [gl_FUNC_GETOPT_GNU]) |