编译安装nginx需要pcre包，未安装会有如下提示：
./configure: error: the http rewrite module requires the pcre library.you can either disable the module by using --without-http_rewrite_moduleoption, or install the pcre library into the system, or build the pcre librarystatically from the source with nginx by using --with-pcre=<path> option.
需要安装pcre的devel包，pcre-devel。使用yum安装即可：（以下命令还带有ssl、zlib等依赖的安装）
yum -y install zlib zlib-devel openssl openssl--devel pcre pcre-devel
以上就是编译安装nginx却requires the pcre library的详细内容。