问安装memcache执行make && make install报错，环境是PHP7？

执行make && make install时，提示下面的错误：【错误只是一部分】

/root/memcached-2.2.0/php_memcached.c: In function ‘zm_startup_memcached’:

/root/memcached-2.2.0/php_memcached.c:4496: error: ‘php_memc_new’ undeclared (first use in this function)

/root/memcached-2.2.0/php_memcached.c:4508: error: too many arguments to function ‘zend_register_internal_class_ex’

make: *** [php_memcached.lo] Error 1

想问下有没有大神遇到过这个错误的，应该怎么解决？我跳过这个错误跑完了后面的步骤提示memcache扩展没有安装成功。到底是啥原因呢？