编译安装php时报错 libtool: link: `ext/opcache/ZendAccelerator.lo' is not a valid libtool object

安装包：php-5.6.20.tar.bz2

编译成功完成，结果在 make 的时候报错

libtool: link: `ext/opcache/ZendAccelerator.lo' is not a valid libtool object

解决办法：

# make distclean

重新编译 make