尝试遵循这些说明：（http://dev.mysql.com/doc/refman/5.1/en/ha-memcached-interfaces-mysqludf.html）
shell> tar zxf memcached_functions_mysql-1.1.tar.gz
shell> cd memcached_functions_mysql-1.1
shell> # If memcached library is not found, set LDFLAGS=-Llibrary_directory before next command.
shell> ./configure --with-mysql=/usr/local/mysql/bin/mysql_config
当我运行时：
sudo ./configure --with-mysql=/usr/lib64/mysql/mysql_config
我在输出结束时得到这个：
checking for libmemcached >= 0.17... configure: error: libmemcached not found
所以我尝试按照上面的说明设置 LDFLAGS 但不知道“library_directory”路径。
我怎样才能找到它？
更新1：根据下面的回复。libmemcached 已安装：
sudo yum install libmemcached
Loaded plugins: downloadonly, replace, rhnplugin, security
epel | 3.7 kB 00:00
ius | 2.2 kB 00:00
rackspace-rhel-x86_64-server-5.6.z-common | 871 B 00:00
rhel-x86_64-server-5.6.z | 1.3 kB 00:00
Excluding Packages in global exclude list
Finished
Setting up Install Process
Package libmemcached-0.31-1.1.el5.x86_64 already installed and latest version
Nothing to do
谢谢