The script should work out of the box for the iOS 8.x SDKs and probably newer releases as well.
If you are using SDK version 7.x or older, you need to specify the exact SDK version inside **build.sh**, for example:
```
IOS_SDK_VERSION=7.1
```
### Optimization
By default, no compiler optimizations are specified inside the build script. For an optimized build, add the corresponding flags to the CFLAGS definition inside **build.sh**.