memcached make: *** No targets specified and no makefile found. Stop.

在安装memcached其间出现以下错误

memcached make: *** No targets specified and no makefile found.  Stop.

checking for libevent directory... configure: error: libevent is required. You can get it from http://www.monkey.org/~provos/libevent/

If it's already installed, specify its path using --with-libevent=/dir/

其实是因为在安装libevent时增加了版本号导致的，所以注意在安装libevent时不要增加版本号

rpm -qa|grep libevent
查看系统是否带有该安装软件，如果有执行命令:
rpm -e libevent-1.4.13-4.el6.x86_64 --nodeps（由于系统自带的版本旧，忽略依赖删除）
2. 安装libevent命令：
tar zxvf libevent-2.0.21-stable.tar.gz
  cd libevent-2.0.21-stable
  ./configure --prefix=/usr/local/libevent
  make
  make install
至此libevent安装完毕；