PHP ZendGuard loader install probelm

I used the offical php ext from http://www.zend.com/en/products/loader/downloads#Linux

But it have some error ,

```
/ # php -m
Failed loading /usr/local/lib/php/extensions/zend/ZendGuardLoader.so: Error relocating /usr/local/lib/php/extensions/zend/ZendGuardLoader.so: backtrace: symbol not found
Failed loading /usr/local/lib/php/extensions/zend/opcache.so: Error relocating /usr/local/lib/php/extensions/zend/opcache.so: backtrace: symbol not found
```

by the way I have tried install glibc, but error still come out.

anyone have meet such problem ?