error: memcached support requires ZLIB. Use --with-zlib-dir=<DIR> to specify the prefix where ZLIB headers and library are located
解决：sudo apt-get install zlib1g-dev
error: memcached support requires libmemcached. Use --with-libmemcached-dir=<DIR> to specify the prefix where libmemcached headers and library are located
解决：sudo apt-get install libmemcached-dev
`php_memcached.lo' is not a valid libtool object