apache2.4.9编译成功后，启动时出错：
httpd: Syntax error on line 116 of /app/apacheNew/conf/httpd.conf: Cannot load modules/mod_proxy.so into server: /app/apacheNew/modules/mod_proxy.so: undefined symbol: apr_global_mutex_lockfile
httpd -V发现APR版本不一致，怎么回事啊？
Server loaded: APR 1.2.7, APR-UTIL 1.5.3
Compiled using: APR 1.5.1, APR-UTIL 1.5.3