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Using CMAKE + VS + windeployqt to run a 64-bit Qt Application

  • Hi,

    I want to create an graphical user interface for our software which is based on a 64-bit architecture. After 2 days of intense work I set up CMAKE with windeployqt to get all .dll from "Qt\5.9\winrt_x64_msvc2017" copied correctly to my binary directory. Compiling the software with VS leads to this error: (0xc000a200) which belongs to an appcontainer problem (source). The mentioned solution to extend the additional options of the linker with /APPCONTAINER:NO didn't solved the problem.
    Further hours in googleling arose the question if my setup is able to produce 64 bit Applictations. The Posts in stackoverflow and Qt-Forum said that I have to have a 64-bit Qt version to build a 64-bit Qt Application.

    My questions are:

    • Are the two last post still relevant? So do I need a 64-bit Qt (ownbuild) version to build a 64 bit application?
    • If not how do I solve the issue (0xc000a200)
    • What is the "winrt_x64_msvc2017" Compiler option in Qt-Creator for? Is this for building real windows software or for apps and mobile applications?
    • To me Qt VS Tools should make life easier, using Qt and VS. But loading a Qt .pro file results in:
      [1] - C:/QT/5.9/WINRT_X64_MSVC2017/mkspecs/features/toolchain.prf:129: Variable QMAKE_CXX.COMPILER_MACROS is not defined.
      [2] - Project ERROR: msvc-version.conf loaded but QMAKE_MSC_VER isn't set
      I Am using VS 2017, someone has a hint how to solve this issue ?

    Thanks in advance for help :)

  • Lifetime Qt Champion

    Hi and welcome to devnet,

    The winrt package is to build application for the UWP concept.

    If you want to build a classic desktop then yes, you first have to use a 64 bit version of Qt. That one is already available through either the online or the offline installer.

  • Okay thanks for reply.
    I'm developing on Windows and I can't find a 64 bit distribution for Windows in the Download area of Qt. Am I wrong or is the only solution to build it myself?


  • Lifetime Qt Champion

    @goodart There are several 64bit versions of Qt for Windows. What are you using to install it? Qt Online Installer of offline packages?

  • both info pages of the online and offline installer doesn't provide 64 bit. Where is my fallacy?

    Thanks for helping.

  • Lifetime Qt Champion

    @goodart Just take the online installer even if it is 32bit - that doesn't matter. The online installer will provide you a list of all available Qt version including 64bit. Then just select the one you need and install.

  • okay thank you very much. And doing so gives me more librarys in the Qt Installation dir than the one (following) I currently have?

    • mingw53_32
    • winrt_armv7_msvc2017
    • winrt_x64_msvc2017
    • winrt_x86_msvc2017

  • Lifetime Qt Champion

    @goodart Not sure I understand your question. Online installer will show you all available Qt versions. Which to install depends on the compiler you want to use. For example mingw53_32 is using MinGW. If you want to use Microsoft C++ compiler then you need MSVC2015 or MSVC2017, but then you need to install the corresponding Visual Studio version.
    I don't think you need WinRT.

  • Ok. I got it. Didn't installed the correct Setup with the online Installer. Now everything is working. Thanks!

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