Implement the new '--with-big-tables' flag to "configure".

Using it comes merged from 4.1.

config/ac-macros/misc.m4

@@ -636,3 +636,31 @@ fi
 
 dnl ---------------------------------------------------------------------------
 
+
+dnl ---------------------------------------------------------------------------
+dnl Macro: MYSQL_CHECK_BIG_TABLES
+dnl Sets BIG_TABLES if --with-big-tables is used
+dnl ---------------------------------------------------------------------------
+AC_DEFUN([MYSQL_CHECK_BIG_TABLES], [
+  AC_ARG_WITH([big-tables],
+              [
+  --with-big-tables       Support tables with more than 4 G rows even on 32 bit platforms],
+              [bigtables="$withval"],
+              [bigtables=no])
+  AC_MSG_CHECKING([for big tables support])
+
+  case "$bigtables" in
+    yes )
+      AC_DEFINE([BIG_TABLES], [1], [Support big tables])
+      AC_MSG_RESULT([yes])
+      ;;
+    * )
+      AC_MSG_RESULT([no])
+      ;;
+  esac
+
+])
+dnl ---------------------------------------------------------------------------
+dnl END OF MYSQL_CHECK_BIG_TABLES SECTION
+dnl ---------------------------------------------------------------------------
+