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# ===============================================================================
# http://www.nongnu.org/autoconf-archive/ax_check_awk_variable_value_pairs.html
# ===============================================================================
#
# SYNOPSIS
#
# AX_CHECK_AWK_VARIABLE_VALUE_PAIRS([ACTION-IF-SUCCESS],[ACTION-IF-FAILURE])
#
# DESCRIPTION
#
# Check if AWK supports variable=value pairs ($AWK '<PROGRAM>' var=val).
# If successful execute ACTION-IF-SUCCESS otherwise ACTION-IF-FAILURE.
#
# This work is heavily based upon testawk.sh script by Heiner Steven. You
# should find his script (and related works) at
# <http://www.shelldorado.com/articles/awkcompat.html>. Thanks to
# Alessandro Massignan for his suggestions and extensive nawk tests on
# FreeBSD.
#
# LICENSE
#
# Copyright (c) 2009 Francesco Salvestrini <salvestrini@users.sourceforge.net>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved.
AC_DEFUN([AX_CHECK_AWK_VARIABLE_VALUE_PAIRS],[
AC_REQUIRE([AX_NEED_AWK])
AC_MSG_CHECKING([if $AWK supports variable=value pairs])
ax_try_awk_output=`echo "" | $AWK '{ print variable; }' variable=A 2> /dev/null`
AS_IF([test $? -eq 0],[
AS_IF([test "X$ax_try_awk_output" = "XA"],[
AC_MSG_RESULT([yes])
$1
],[
AC_MSG_RESULT([no])
$2
])
],[
AC_MSG_RESULT([no])
$2
])
])
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