Installation and Deployment

Sorry, I hadn't come back to trying this for a while. I was able to get past this by dropping -optimize-size, but ran into other strange issues, primarily where a purely debug build had a bunch of errors and a mixed config build would not create the debug lib files (likely due to the same cause, just the errors didn't show or halt the build for some reason) even though the process appeared to complete successfully. Not having much luck with Qt6 it seems, which is a shame since I'd really like to make use of the upstream changes I submitted for it. Luckily at this point MSVCs internal CMake version has been updated to one that is compatible with Qt6, so the manual replacement is no longer needed. I'm currently trying to build 6.1 and was able to get past the configure step, though I had to disable tests (which this time I wanted to confirm it built correctly) due to QTBUG-88829, so I'll see if I have better luck this time. If the mixed build doesn't work I'll try just a debug one again to see if there are the errors I had before, or if not so that I can compile tests and see what might be failing.

I solved it by compiling the source module code with qt creator and trying to build the library from there. Then I manually copied it into QT_INSTALL_LIBS.

Hi author here, Now there's a dedicated guide available to follow for cross-compiling latest QT for any Raspberry Pi Model or Version with mentioned GCC toolchains: https://github.com/abhiTronix/raspberry-pi-cross-compilers/blob/master/QT_build_instructions.md

@Nan-Feng said in Version control of Qt compiled files: So is there any way to modify him? Yes, checkout the branch you want to build (git checkout BRANCH_NAME). "When I skip some modules in 5.15.2, will the size of the .exe be reduced a lot?" - no, because with static compilation only libs (in fact only used parts of the libs) which are used by your app are linked into your executable. Don't expect small exe files if you use static libs.

Hi and welcome to devnet, Might be a silly question but did you download the zip or tar.xz archive ?

Just build Qt and don't deploy the xcb plugin (if it is really build).

If you do not have an X11 session running, you won't be able to use the xcb plugin. What are you using to show your graphical application ?

Hi, Why not use the Qt 4 version provided by your distribution ?

@C-Cubed As suggested before, your issue sound like they come from moving major release Qt4 to Qt5, not poor Ubuntu 18.04 to 20.04, which you keep shouting at! ;-)

@SGaist He does Qt since many years ... but he is in many aspects not up to date ;-)

I'm facing the same problem with v6.1.0-beta3. Unfortunately, example project cannot be compiled. I tried to add libQt6PacketProtocol.a but the issue still remains

You can use sed to modify the relevant lines.

@Alex_Kr said in Qt5 xcb plugin compilation: Kubuntu 14 This is a 7 years old distribution without any support (not even security patches)! I would say it's time to upgrade :-)

@SGaist Thank you for your reply. I just checked kits and add cmake path in it. Now it can work. Thank you very much.

The error was due my navigation plugin, so I recommend to check your plugins in case of this error.

@jsulm Thank you a lot. Solved it.

Unfortunately there was no answer. I've then reinstalled from scratch. Anyway, I am marking this as "solved", as it seems works (for) now.