three set of dlls - which one to use in my program package?

**wysota** · 2nd July 2009, 08:41

Originally Posted by FS Lover

I have qt 4.5.1 installed on windows with mingw.
I found that there exist two set of qt dlls like QtGui4.dll in my installation.
a set of qt dlls in <qt dir>\bin and another set in <qt dir>\qt\bin.
and there exists three mingwm10.dll files too. one in bin directory another in qt\bin and the other one in mingw\bin. they are different because their size don't match.
I want to know:
- why 2 or 3 of one dll exist and what is the difference between them.
- which ones should I package with my qt programs.
and I think all these make other users confused like me.

One set of Qt libraries is to run Qt Creator (as it is distributed with a bleeding edge functionality of Qt) and the other set is the "proper" 4.5.1 set of libraries that you should use.