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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_recursive_eval.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_RECURSIVE_EVAL(VALUE, RESULT)
- #
- # DESCRIPTION
- #
- # Interpolate the VALUE in loop until it doesn't change, and set the
- # result to $RESULT. WARNING: It's easy to get an infinite loop with some
- # unsane input.
- #
- # LICENSE
- #
- # Copyright (c) 2008 Alexandre Duret-Lutz <adl@gnu.org>
- #
- # This program is free software; you can redistribute it and/or modify it
- # under the terms of the GNU General Public License as published by the
- # Free Software Foundation; either version 2 of the License, or (at your
- # option) any later version.
- #
- # This program is distributed in the hope that it will be useful, but
- # WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- # Public License for more details.
- #
- # You should have received a copy of the GNU General Public License along
- # with this program. If not, see <https://www.gnu.org/licenses/>.
- #
- # As a special exception, the respective Autoconf Macro's copyright owner
- # gives unlimited permission to copy, distribute and modify the configure
- # scripts that are the output of Autoconf when processing the Macro. You
- # need not follow the terms of the GNU General Public License when using
- # or distributing such scripts, even though portions of the text of the
- # Macro appear in them. The GNU General Public License (GPL) does govern
- # all other use of the material that constitutes the Autoconf Macro.
- #
- # This special exception to the GPL applies to versions of the Autoconf
- # Macro released by the Autoconf Archive. When you make and distribute a
- # modified version of the Autoconf Macro, you may extend this special
- # exception to the GPL to apply to your modified version as well.
-
- #serial 1
-
- AC_DEFUN([AX_RECURSIVE_EVAL],
- [_lcl_receval="$1"
- $2=`(test "x$prefix" = xNONE && prefix="$ac_default_prefix"
- test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
- _lcl_receval_old=''
- while test "[$]_lcl_receval_old" != "[$]_lcl_receval"; do
- _lcl_receval_old="[$]_lcl_receval"
- eval _lcl_receval="\"[$]_lcl_receval\""
- done
- echo "[$]_lcl_receval")`])
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