@adamv To answer your original question, I put that line in because without it, I got the following error:
```
poppler-qt4.sip:24:10: fatal error: 'qt4/poppler-qt4.h' file not found
#include <qt4/poppler-qt4.h>
         ^
1 error generated.
error: command 'cc' failed with exit status 1
```