Static library linking

TheDestroyer

How can I know that?

TheDestroyer

I copied gsl libraries beside the executable, and I got an error with QtCored4.dll... which means, even Qt libraries are not statically linking!

Any ideas?

giesbert

Have you made a complete build from the qt source package with static flag for configure?
The qt distribution does not contain static libraries.

TheDestroyer

I'm using QtCreator. Doesn't it do that automatically if I set the correct flags in qmake?

Does this mean that I always have to have QtCored.dll and some other dlls for Qt with my programs???

koahnig

No, QtCreator does not generate static Qt libraries automatically.

You have to compile Qt with static in configure as suggested by Gerolf.

Even without the static libraries you do not need to have Qt dlls with your programs. Typically it is assumed that someone receiving your program has already Qt dlls installed.

giesbert

If you install QtCreator, you have no libraries (it#s only the IDE)
If you install the SDK, you have the dlls you can use but not libraries for static linking. If you need static linking, please use the search on the forum and the wiki, there were many topics on that one. You have to build Qt for static linkage from the sources. Sorry, there is no other way for statically linked executables.

TheDestroyer

Thank you. I'll see what I can do about it. :-)

goetz

Be aware of the licensing implications, when linking statically to Qt!

TheDestroyer

Could you please tell me about them? I'm using my programs for the university to create physics simulations!!! I'm not gonna sell them!!

goetz

Have a look at the tag search, please:

The base line (I'm not a lawyer!) is, that you most probably have to GPL your code if you do static linking (except in case you use commercial license, of course).