Installation and Deployment

@Wieland cross compile sounds good but certain ROS packages that I plan to run on the nanopi M3 have Qt5 as dependency. So I think Qt5 has to be installed and setup on the nanopi as well. What do you think ?

Hi and welcome to devnet, Do you have the application still running ? If so you should first stop it. IIRC, recent version of Qt Creator do that for you, or at least there's a setting for that. If not, got any antivirus running on your system ? Some of them tent to put the generated executable directly in quarantine.

Please don't highjack other people thread. You are already getting answers on your other thread here. And you should use the complete path to the qmake of the version of Qt you are trying to build the plugin for. Without the path, you are calling your distribution installed qmake. Furthermore this one is for Qt 4.

Hi, Did you try to start your application with the "QT_DEBUG_PLUGINS" environment variable set to 1 ? That might give you more information about what is happening with your plugin.

@SGaist thanks i will check with them.

Hi and welcome to devnet, Do you have an example of such tests ?

Can you check what differs between the two implementation ?

Ok thanks, I thought I read somewhere that qmake was a part of QtCreator, not Qt itself.

Hi Cyrilb, Do you fix this issue now ? I have same problem as yours. Anyone knows how qt to detect DirectFB support or not ? Thank You! Cliff

Hi, I've forked the topic since it was not the same problem. Do you get errors when linking to that library ?

@raven-worx How did I not find this earlier!? haha Thanks for the link :)

Thanks @Wieland! That link was unfortunately not enough .... I did all that and the same thing was happening. However, that thread did contain another link to QT documentation I didn't know about and that one did solve the problem: http://wiki.qt.io/Deploy_an_Application_on_Windows .... I used the "quick and dirty" version: not so great in terms of engineering, but it did solve the problem: what remains is refining out what is not necessary. Thanks!

@sierdzio said in So Yocto Pyro 2.3.1 cross-compilation SDK, Qt 5.9+QML app, cmake and QtQuickCompiler all walk into the build environment...: Yes, that's why I suggest contacting the Qt Company. They have run the qml compiler on ARM so they should be able to help. Especially when you are - as you mention - a commercial customer. I'll try this, thanks.

@hskoglund said in Crushes after deploying!: Hi, googling finds many with the same problem, for example here Just guessing, but perhaps you could try some of the suggestions in there... Thanks for the link. It seems this issue doesn't even solved in Stack Overflow :( Any way, I did some of the suggestions mentioned in it. Installed all redistributable package of x86 (cuz I built my app using Qt mingw53_32) for 2012 - 2013 - 2015 - 2017 (I tested my app after each vcredist) Installed all redistributable package of x64 for 2012 - 2013 - 2015 - 2017 (I tested my app after each vcredist) Nothing changed still see my app crashes without any logical reason! Now I'm very sad because I can run my app only if I installed Qt on my machine which is impractical solution for deploying my app.

Hi and welcome to devnet, See the QtSDKRepoChooser project

I'm pretty sure I ran configure.bat from the correct location. However, I certainly could have messed that up by accident. I'll try it again and verify I do it the way you suggest. Thanks for the suggestions.

@selll_93 said in Problem with QJsonValue include QJsonObject: I had QT 4.8 and QT 5.5 installed on my computer, and somehow it called only 4.8 Make sure Qt is not in your system PATH. If you are building from the command line, make sure you run qmake from Qt 5.5, not Qt 4.8. If you are building from Qt Creator, make sure your project is set up to use Qt 5.5, not Qt 4.8: http://doc.qt.io/qtcreator/creator-configuring-projects.html