1,安装gcc，apache, apxs
yum install gcc httpd httpd-devel
2,apxs -g -n helloword
3,apxs -c mod_helloworld.c
4,apxs -i mod_helloworld.la
生成了mod_helloworld.so文件在
/usr/lib64/httpd/modules目录下
修改http.conf文件
添加
LoadModule helloworld_module /usr/lib64/httpd/modules/mod_helloworld.so
<Location /helloworld>
SetHandler helloworld
</Location>
restart apache
$service httpd stop/systemctl stop httpd.service
$service httpd start /systemctl start httpd.service
原文：http://www.cnblogs.com/mjaioy/p/3945595.html