mirror of https://git.tukaani.org/xz.git
72 lines
2.6 KiB
Plaintext
72 lines
2.6 KiB
Plaintext
# getopt.m4 serial 14 (modified version)
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dnl Copyright (C) 2002-2006, 2008 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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# The getopt module assume you want GNU getopt, with getopt_long etc,
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# rather than vanilla POSIX getopt. This means your code should
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# always include <getopt.h> for the getopt prototypes.
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AC_DEFUN([gl_GETOPT_SUBSTITUTE],
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[
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AC_LIBOBJ([getopt])
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AC_LIBOBJ([getopt1])
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gl_GETOPT_SUBSTITUTE_HEADER
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])
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AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
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[
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GETOPT_H=getopt.h
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AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
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[Define to rpl_ if the getopt replacement functions and variables
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should be used.])
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AC_SUBST([GETOPT_H])
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])
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AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
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[
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if test -z "$GETOPT_H"; then
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AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
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fi
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if test -z "$GETOPT_H"; then
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AC_CHECK_FUNCS([getopt_long], [], [GETOPT_H=getopt.h])
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fi
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dnl BSD getopt_long uses a way to reset option processing, that is different
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dnl from GNU and Solaris (which copied the GNU behavior). We support both
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dnl GNU and BSD style resetting of getopt_long(), so there's no need to use
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dnl GNU getopt_long() on BSD due to different resetting style.
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dnl
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dnl With getopt_long(), some BSD versions have a bug in handling optional
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dnl arguments. This bug appears only if the environment variable
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dnl POSIXLY_CORRECT has been set, so it shouldn't be too bad in most
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dnl cases; probably most don't have that variable set. But if we actually
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dnl hit this bug, it is a real problem due to our heavy use of optional
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dnl arguments.
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dnl
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dnl According to CVS logs, the bug was introduced in OpenBSD in 2003-09-22
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dnl and copied to FreeBSD in 2004-02-24. It was fixed in both in 2006-09-22,
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dnl so the affected versions shouldn't be popular anymore anyway. NetBSD
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dnl never had this bug. TODO: What about Darwin and others?
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if test -z "$GETOPT_H"; then
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AC_CHECK_DECL([optreset],
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[AC_DEFINE([HAVE_OPTRESET], 1,
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[Define to 1 if getopt.h declares extern int optreset.])],
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[], [#include <getopt.h>])
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fi
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dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
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dnl option string (as of 2005-05-05). We don't use that feature, so this
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dnl is not a problem for us. Thus, the respective test was removed here.
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])
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AC_DEFUN([gl_GETOPT_IFELSE],
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[
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AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
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AS_IF([test -n "$GETOPT_H"], [$1], [$2])
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])
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AC_DEFUN([gl_GETOPT], [gl_GETOPT_IFELSE([gl_GETOPT_SUBSTITUTE])])
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