build: make the autoconf-2.63 requirement explicit

* configure.ac: AC_PREREQ: Require 2.63, not 2.59. And quote properly.
Autoconf-2.63 has been required for some time via gnulib.
This merely makes it explicit.
This commit is contained in:
Jim Meyering 2018-12-23 17:24:34 -08:00
parent 6cd60762b2
commit 1505982238

View File

@ -16,7 +16,7 @@
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
AC_PREREQ(2.61)
AC_PREREQ([2.63])
AC_INIT([GNU diffutils],
m4_esyscmd([build-aux/git-version-gen .tarball-version]),