```bash
# compile for android.
$ ./build_native.py
```
Error message as follow:
```
ssize_tjni/../../cocos2d/cocos/./3d/CCBundleReader.cpp:94:23: error: return type of out-of-line
definition of 'cocos2d::BundleReader::tell' differs from that in the declaration
ssize_t BundleReader::tell()
^
jni/../../cocos2d/cocos/./3d/CCBundleReader.h:90:14: note: previous declaration is here
long int tell();
^
1 error generated.
```