源码安装Apache，报错：Cannot use an external APR with the bundled APR-util
httpd-2.2.29.tar.gz
解决此问题：
1、安装APR：
[root@web httpd-2.2.29]# cd srclib/apr
[root@web apr]# ./configure --prefix=/usr/local/apr
[root@web apr]# make && make install
2、安装APR-util
[root@web httpd-2.2.29]# cd srclib/apr-util
[root@web apr-util]# ./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr
[root@web apr-util]# make && make install
3、安装apache，加入参数（--with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util）
[root@web httpd-2.2.29]# ./configure --prefix=/usr/local/apache2 --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util
[root@web httpd-2.2.29]# make
[root@web httpd-2.2.29]# make install
[root@web httpd-2.2.29]# ./configure --prefix=/opt/apache --enable-deflate --enable-expires --enable-headers --enable-modules=most --enable-so --with-mpm=worker --enable-rewrite --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util
OK。