diff options
Diffstat (limited to 'm4/getopt.m4')
| -rw-r--r-- | m4/getopt.m4 | 81 |
1 files changed, 41 insertions, 40 deletions
diff --git a/m4/getopt.m4 b/m4/getopt.m4 index cfbe40f..af8bfd4 100644 --- a/m4/getopt.m4 +++ b/m4/getopt.m4 @@ -1,71 +1,72 @@ -# getopt.m4 serial 14 (modified version) -dnl Copyright (C) 2002-2006, 2008 Free Software Foundation, Inc. +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. -# The getopt module assume you want GNU getopt, with getopt_long etc, -# rather than vanilla POSIX getopt. This means your code should -# always include <getopt.h> for the getopt prototypes. +# This version has been modified to reduce complexity since we only need +# GNU getopt_long and do not care about replacing getopt. -AC_DEFUN([gl_GETOPT_SUBSTITUTE], +# 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_LIBOBJ([getopt]) - AC_LIBOBJ([getopt1]) - gl_GETOPT_SUBSTITUTE_HEADER -]) + AC_REQUIRE([gl_GETOPT_CHECK_HEADERS]) -AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER], -[ - GETOPT_H=getopt.h - AC_DEFINE([__GETOPT_PREFIX], [[rpl_]], - [Define to rpl_ if the getopt replacement functions and variables - should be used.]) - AC_SUBST([GETOPT_H]) + if test -n "$gl_replace_getopt"; then + gl_GETOPT_SUBSTITUTE + fi ]) AC_DEFUN([gl_GETOPT_CHECK_HEADERS], [ - if test -z "$GETOPT_H"; then - AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h]) + gl_replace_getopt= + + if test -z "$gl_replace_getopt"; then + AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes]) fi - if test -z "$GETOPT_H"; then - AC_CHECK_FUNCS([getopt_long], [], [GETOPT_H=getopt.h]) + if test -z "$gl_replace_getopt"; then + AC_CHECK_FUNCS([getopt_long], [], [gl_replace_getopt=yes]) fi dnl BSD getopt_long uses a way to reset option processing, that is different dnl from GNU and Solaris (which copied the GNU behavior). We support both dnl GNU and BSD style resetting of getopt_long(), so there's no need to use dnl GNU getopt_long() on BSD due to different resetting style. - dnl - dnl With getopt_long(), some BSD versions have a bug in handling optional - dnl arguments. This bug appears only if the environment variable - dnl POSIXLY_CORRECT has been set, so it shouldn't be too bad in most - dnl cases; probably most don't have that variable set. But if we actually - dnl hit this bug, it is a real problem due to our heavy use of optional - dnl arguments. - dnl - dnl According to CVS logs, the bug was introduced in OpenBSD in 2003-09-22 - dnl and copied to FreeBSD in 2004-02-24. It was fixed in both in 2006-09-22, - dnl so the affected versions shouldn't be popular anymore anyway. NetBSD - dnl never had this bug. TODO: What about Darwin and others? - if test -z "$GETOPT_H"; then + if test -z "$gl_replace_getopt"; then AC_CHECK_DECL([optreset], [AC_DEFINE([HAVE_OPTRESET], 1, [Define to 1 if getopt.h declares extern int optreset.])], [], [#include <getopt.h>]) fi - dnl Solaris 10 getopt doesn't handle `+' as a leading character in an - dnl option string (as of 2005-05-05). We don't use that feature, so this + dnl POSIX 2008 does not specify leading '+' behavior, but see + dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on + dnl the next version of POSIX. We don't use that feature, so this dnl is not a problem for us. Thus, the respective test was removed here. + + dnl Checks for getopt handling '-' as a leading character in an option + dnl string were removed, since we also don't use that feature. + ]) -AC_DEFUN([gl_GETOPT_IFELSE], +AC_DEFUN([gl_GETOPT_SUBSTITUTE], [ - AC_REQUIRE([gl_GETOPT_CHECK_HEADERS]) - AS_IF([test -n "$GETOPT_H"], [$1], [$2]) + 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_GETOPT_IFELSE([gl_GETOPT_SUBSTITUTE])]) +AC_DEFUN([gl_GETOPT], [gl_FUNC_GETOPT_GNU]) |