编译Tomcat mod_jk出错：apxs sanity.

gus

http server:apache2.0.4
java server: tomcat4.1.8

当我用./configure --with-apxs=/usr/local/apache2/bin/apxs去生成make文件时，报错如下：

[root@richard webapp]# ./configure --with-apxs=/usr/local/apache2/bin/apxs

Configuring WebApp Module
+ checking build system type... i686-pc-linux-gnuoldld
+ checking host system type... i686-pc-linux-gnuoldld
+ checking for sources directory path... /opt/jakarta-tomcat-connectors-4.1.18-src/webapp
+ checking for build directory path... /opt/jakarta-tomcat-connectors-4.1.18-src/webapp

Checking Apache APXS
+ checking for apxs name... /usr/local/apache2/bin/apxs
+ checking for apxs directory path... /usr/local/apache2/bin
+ checking for apxs... /usr/local/apache2/bin/apxs
+ checking for apxs availability... /usr/local/apache2/bin/apxs
+ checking for apxs version... /usr/local/apache2/bin/apxs (2.0)
+ checking for apxs sanity... error
configure: error: apxs is unworkable

请问这是怎么回事？