# Determine whether recent-enough GNU Make is being used.
-# Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
+# Copyright (C) 2007, 2009-2018 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# Set GNU_MAKE if we are using a recent-enough version of GNU make.
-# Use --version AND trailing junk, because SGI Make doesn't fail on --version.
-
AC_DEFUN([gl_GNU_MAKE],
[
AM_CONDITIONAL([GNU_MAKE],
- [${MAKE-make} --version /cannot/make/this >/dev/null 2>&1])
+ [LC_ALL=C ${MAKE-make} --version 2>/dev/null | sed -e '2,$d' | grep GNU >/dev/null])
])