Internal functions not declared static

```
The "general functions" that are generated (_memcmp etc.) aren't given 
prototypes in the header as you might expect as they are private, but aren't 
declared 'static' so those symbols will be exposed from the object file, 
potentially conflicting with other public symbols in the application.
```

Original issue reported on code.google.com by `w...@wykeham.net` on 25 Apr 2014 at 1:32
