I have issue with installing "mysqlnd memcache" plugin (mysqlnd_memcache.so) to use with InnoDB Memcached Daemon (having its "/usr/lib/mysql/plugin/libmemcached.so") on Ubuntu (Bionic) 18.0.4.
The problem is that the official installation instruction for "mysqlnd memcache" plugin wants "include/libmemcached/memcached.h" to be contained by the directory where libmemcached.so is stored. (In addition to use --with-libmemcached-dir=(DIR for libmemcached.so), but that memcached.h is not available anywhere in ubuntu system
B) i also need help in understanding this line in official documentation "This (the directory of libmemcached.so) directory has to contain the include/libmemcached/memcached.h file. Official Documentation: https://www.php.net/manual/en/memcached.installation.php Main Link: https://www.php.net/manual/en/intro.mysqlnd-memcache.php