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# Determine whether recent-enough GNU Make is being used.
# Copyright (C) 2007, 2009-2020 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
# Written by Paul Eggert.
# Set GNU_MAKE if we are using a recent-enough version of GNU make.
AC_DEFUN([gl_GNU_MAKE],
[
AM_CONDITIONAL([GNU_MAKE],
[LC_ALL=C ${MAKE-make} --version 2>/dev/null | sed -e '2,$d' | grep GNU >/dev/null])
])
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