% ./configure -enable-so [--with-mpm=worker]
% make
% make install

 % cd /path/to/apache-source
 % /usr/local/apache2/bin/apxs -c modules/proxy/mod_proxy.c modules/proxy/proxy_util.c
 % /usr/local/apache2/bin/apxs -i -a -n proxy modules/proxy/mod_proxy.la 

 % /usr/local/apache2/bin/apxs -c modules/proxy/mod_proxy_balancer.c modules/proxy/proxy_util.c
 % /usr/local/apache2/bin/apxs -i -a -n proxy_balancer modules/proxy/mod_proxy_balancer.la

 % /usr/local/apache2/bin/apxs -c modules/proxy/mod_proxy_http.c modules/proxy/proxy_util.c
 % /usr/local/apache2/bin/apxs -i -a -n proxy_http modules/proxy/mod_proxy_http.la