Don't use but need to run application?

[banlinhtienphong]

I write my qt application don't use qtwebkit, qtsql, qtxml, qtnetwork, I build successful but when create standard alone application and run then have error : unable to locate component qtsql4.dll not found. When I add qtsql4.dll then have error unable to locate component
qtxml4.dll not found,.... final, I add all 4 dll follow: qtwebkit4.dll, qtsql4.dll, qtxml4.dll, qtnetwork4.dll then application run successful.Why in my code don't use these libraries but when run still need them?

[Hostel]

How looks project file?

[andre]

Sounds like you linked to these modules even if you didn't use them... Indeed, show us your project (.pro) file, especially the section
@
QT += ...
@