错误为：./configure: error: the HTTP rewrite module requires the PCRE library.
安装pcre-devel解决问题
yum -y install pcre-devel
还有可能出现：
错误提示：./configure: error: the HTTP cache module requires md5 functions
from OpenSSL library. You can either disable the module by using
--without-http-cache option, or install the OpenSSL library into the system,
or build the OpenSSL library statically from the source with nginx by using
--with-http_ssl_module --with-openssl=<path> options.
解决办法：
yum -y install openssl openssl-devel