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