Qt cannot create standalone exe

Question

I have seen a lot of topics, questions and solutions online but still I cannot fix this issue. I have an exe which is 1.7 KB size but when I move it to another computer and I try to open it there is the typical error. I use QtCreator 4.4.0.

When I try to add Qt5Core.dll, Qt5Gui.dll and QtWidgets.dll then I get the error

Unable to find the entry point

What to do now?

I have executed windeployqt but I have a 600 MB of dlls!! There are Qt5Core.dll and Qt5Cored.dll among these
I have tested the solution I have found online which says "use static linking". Well I have added "CONFIG += static" then in the IDE I give a Project > Build and Project > Run qmake.

Still the errors. I have been struggling with this since yesterday. So what do I have to do? I need to have a single executable or if it's not possible at least an exe with some dlls (but not 600 MB of dlls).

Are you sure to not mixing the Qt version and or compiler when build and use `windeployqt`? — Antonio Dias, May 23 '18 at 16:57
OK! Due to size of the dlls gave by `windeployqt` i'm guess that you are in debug mode, please look at the Qt Creator in the box at left side and above the compile (play) button and tell us if it's true! — Antonio Dias, May 23 '18 at 17:10
Yes it's debug! I've turned it into Release, then Clean All and now I've made Build All. I'll test now and see how it goes! — Raffaele Rossi, May 23 '18 at 17:11
@AntonioDias it works now! I had to put it into release mode. By the way I had to add a lot of dlls like QtGui.dll, QtCore.dll, libwinpthread, libstdc++ and libstd_gcc! — Raffaele Rossi, May 23 '18 at 17:19
Is it possible to statically link them to the exe? so I have only the exe (the standalone file). Thank you very much btw antonio!! — Raffaele Rossi, May 23 '18 at 17:20
https://stackoverflow.com/questions/1011197/qt-static-linking-and-deployment — drescherjm, May 23 '18 at 17:25

score 1 · Accepted Answer · answered May 23 '18 at 17:51

From the comments: Due to size of the dlls gave by windeployqt i guess that you are in Debug mode, switch to Release mode and yours problems will gone!

For a static linking, you can either search for some instructions to make your own static build of Qt or search for a precompiled binaries if you trust the origin! :)

Qt cannot create standalone exe

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