NEWS: fix chronology.

[bison.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index df6072f3b769c5302f9cb0b37c8e1a9d8c5176a0..b0d6c5b0b5dae775de4574821f346fbfd76f1974 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -15,8 +15,10 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# testsuite -C appears in 2.62.
-AC_PREREQ(2.62)
+# In order for some versions of Sun Studio to compile our C++ test cases
+# correctly, we need Autoconf 2.64 or better to handle the restrict
+# keyword in at least string.h from gnulib.
+AC_PREREQ(2.64)
 
 AC_INIT([GNU Bison],
         m4_esyscmd([build-aux/git-version-gen .tarball-version]),