1# Determine whether recent-enough GNU Make is being used.
2
3# Copyright (C) 2007, 2009-2014 Free Software Foundation, Inc.
4
5# This file is free software; the Free Software Foundation
6# gives unlimited permission to copy and/or distribute it,
7# with or without modifications, as long as this notice is preserved.
8
9# Written by Paul Eggert.
10
11# Set GNU_MAKE if we are using a recent-enough version of GNU make.
12
13# Use --version AND trailing junk, because SGI Make doesn't fail on --version.
14
15AC_DEFUN([gl_GNU_MAKE],
16[
17  AM_CONDITIONAL([GNU_MAKE],
18    [${MAKE-make} --version /cannot/make/this >/dev/null 2>&1])
19])
20