X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=m4%2Fax_debug.m4;h=d83a87e9cfbfa8d559336b904b0403a6bed5f481;hb=386280f69a9b5050751a88addb42568e09efb44b;hp=d2e9a480f7e3737d2c1ed6408653e7d09816a996;hpb=e4adb623298d4ffc84a58ba34dc63dde3733a02f;p=m6w6%2Flibmemcached

diff --git a/m4/ax_debug.m4 b/m4/ax_debug.m4
index d2e9a480..d83a87e9 100644
--- a/m4/ax_debug.m4
+++ b/m4/ax_debug.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 1
+#serial 3
 
-AC_DEFUN([AX_DEBUG],[
+AC_DEFUN([AX_DEBUG],
+    [AC_PREREQ([2.63])dnl
     AC_ARG_ENABLE([debug],
       [AS_HELP_STRING([--enable-debug],
         [Add debug code/turns off optimizations (yes|no) @<:@default=no@:>@])],[