configure错误提示1：
configure:error: in `/usr/local/src/httpd-2.2.21/srclib/apr':
configure:error: no acceptable C compiler found in $PATH
See `config.log'for more details.解决方法：
yum install -y gcc
configure错误提示2：
checking whether to enable mod_deflate... configure: error: mod_deflate has been requested but can not be built due to prerequisite failures
解决方法：
yum install -y zlib-devel
make前为了防止报错可先安装一些库文件：
yum install -y pcre pcre-devel apr apr-devel
启动Apache错误提示:
httpd: Could not reliably determine the server's fully qualified domain name, using 180.16 8.41.175 for ServerName
解决方法：
vim /usr/local/apache2/conf/httpd.conf ServerName www.example.com:80 //去掉前面的注释符# 如下 ServerName www.example.com:80
