mac 下安装redis扩展一直目录没权限，那么php扩展如何指定位置安装？
zhangsandeMacBook-Pro:phpredis-master zhangsan$ sudo make install
Installing shared extensions: /usr/lib/php/extensions/no-debug-non-zts-20121212/
cp: /usr/lib/php/extensions/no-debug-non-zts-20121212/#INST@10110#: Operation not permitted
make: * [install-modules] Error 1
