Update m4

[m6w6/libmemcached] / m4 / ax_assert.m4

diff --git a/m4/ax_assert.m4 b/m4/ax_assert.m4
index 25cd625f4d4e6e589e0759e99bba238b9b321d4c..d13787cd4480c2df4a9d4ec2b2d1a444b1ce986d 100644 (file)
--- a/m4/ax_assert.m4
+++ b/m4/ax_assert.m4
@@ -43,9 +43,10 @@
 #  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 #  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#serial 2
+#serial 4
 
-AC_DEFUN([AX_ASSERT],[
+AC_DEFUN([AX_ASSERT],
+    [AC_PREREQ([2.63])dnl
     AC_REQUIRE([AX_DEBUG])
     AC_ARG_ENABLE([assert],
       [AS_HELP_STRING([--enable-assert],