gcc... So if I got that right, you just configure and manually run the same qmake binary to output for different platforms and then use the generated makefile in the parent makefile project or optionally one step earlier call qmake from the script (but generally not still one step earlier and...)?

@SGaist I wish mean throw this message : QEventLoop: Cannot be used without QApplication But this problem is no more. I have delete the project and create un other without dll... It's not the best solution but it's gona work.

No need for another thread, I got it working. Here are the android related package versions which finally made it to work in case someone else has troubles: [image: 91e09f5d-3a2a-409d-ae8b-a84076d7a362.png] The latest JDK and NDK didn't work. I hope they fix the name strings for the next beta. It's annoying and confusing to have "GCC" everywhere even though it really uses clang.

As an option, you can create a separate thread in your DLL, e.g. QThread. Then, create the QSerialPort and then move it to that thread... Maybe it will help... An idea is that QSerialPort should get a QThread as a parent. AFAIK, it is not simple to use the Qt classes in the separate DLL's. It belongs not only to QSerialPort, it belongs also to other QIODevice and other classes. e.g. that classess can use the QTimer internally, which does not work without of an event loop... So, it is hard... I have not ideas.

@JScars Please try binaries from http://download.qt.io/snapshots/ci/qtwebkit/qtwebkit/qtwebkit-Windows-Windows_7-Mingw53-Windows-Windows_7-X86.7z

You're welcome ! Since you have it working now, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)

@VRonin Thanks!

@jsulm @kshegunov @lemmel Thx all for your replys. The problem came from inside the function of the DLL. In fact, the library allow me to do some task on a machine. This machine is connected to my LAN. The problem was that the machine has a fixed IP address and this IP was out of my LAN. Had to use Wireshark to find the problem ^^ Thx for help :)

Hi, I don't have any immediate plans for this, however, I find it quite a reasonable request, thanks! I've filed an issue to remember about that.

Thanks for your help ! I will take a look a that, and post another thread if I have a lot of problems.

Hi, You have an example in CMake's documentation here

@masoomehsn hi and welcome to devnet, Which version of Qt are you using ? With which compiler ? How did you get the QJoysticks .dll ? Which architecture are they ?

@jsulm @SGaist Thank you for reply. I can't except what library will need. So, I will make question when occurred conflict issue between qt framework and other library. Thanks.

hi, guys I fixed the problem, it was the path thank you.

cool, thank you guys for your answers.

@Dinu-SV hi Dinu tnx for great work but code is a little bit dizzy can u please explain more about how code works ...

After few days searching on Google. I found the answer. The problem is the order you Link to Static Library. Dependency of my Projects is: Presentation << Utilities << DynamicObjectCore in Presentation.pro, I'm link to Static Link Library in this order # Link to DynamicObjectCore ... # Link to Utilities ... I thought that it will compile DynamicObjectCore first, then compile Utilities. But it wan't, and cause the compile error. "undefined reference to..." When i change the Link Order # Link to Utilities ... # Link to DynamicObjectCore ... And it work.