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1# ===========================================================================
2# http://www.gnu.org/software/autoconf-archive/ax_configure_args.html
3# ===========================================================================
4#
5# SYNOPSIS
6#
7# AX_CONFIGURE_ARGS
8#
9# DESCRIPTION
10#
11# Helper macro for AX_ENABLE_BUILDDIR.
12#
13# The traditional way of starting a subdir-configure is running the script
14# with ${1+"$@"} but since autoconf 2.60 this is broken. Instead we have
15# to rely on eval'ing $ac_configure_args however some old autoconf
16# versions do not provide that. To ensure maximum portability of autoconf
17# extension macros this helper can be AC_REQUIRE'd so that
18# $ac_configure_args will alsways be present.
19#
20# Sadly, the traditional "exec $SHELL" of the enable_builddir macros is
21# spoiled now and must be replaced by "eval + exit $?".
22#
23# Example:
24#
25# AC_DEFUN([AX_ENABLE_SUBDIR],[dnl
26# AC_REQUIRE([AX_CONFIGURE_ARGS])dnl
27# eval $SHELL $ac_configure_args || exit $?
28# ...])
29#
30# LICENSE
31#
32# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
33#
34# This program is free software; you can redistribute it and/or modify it
35# under the terms of the GNU General Public License as published by the
36# Free Software Foundation; either version 3 of the License, or (at your
37# option) any later version.
38#
39# This program is distributed in the hope that it will be useful, but
40# WITHOUT ANY WARRANTY; without even the implied warranty of
41# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
42# Public License for more details.
43#
44# You should have received a copy of the GNU General Public License along
45# with this program. If not, see <http://www.gnu.org/licenses/>.
46#
47# As a special exception, the respective Autoconf Macro's copyright owner
48# gives unlimited permission to copy, distribute and modify the configure
49# scripts that are the output of Autoconf when processing the Macro. You
50# need not follow the terms of the GNU General Public License when using
51# or distributing such scripts, even though portions of the text of the
52# Macro appear in them. The GNU General Public License (GPL) does govern
53# all other use of the material that constitutes the Autoconf Macro.
54#
55# This special exception to the GPL applies to versions of the Autoconf
56# Macro released by the Autoconf Archive. When you make and distribute a
57# modified version of the Autoconf Macro, you may extend this special
58# exception to the GPL to apply to your modified version as well.
59
60#serial 9
61
62AC_DEFUN([AX_CONFIGURE_ARGS],[
63 # [$]@ is unsable in 2.60+ but earlier autoconf had no ac_configure_args
64 if test "${ac_configure_args+set}" != "set" ; then
65 ac_configure_args=
66 for ac_arg in ${1+"[$]@"}; do
67 ac_configure_args="$ac_configure_args '$ac_arg'"
68 done
69 fi
70])