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Thread: [ Qt 5.6 ] Examples compilation error 'QCoreApplication'

  1. #1
    Join Date
    Apr 2016
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    Default [ Qt 5.6 ] Examples compilation error 'QCoreApplication'

    Hello,
    While trying compile qt 5.6 examples for embedded platform I got this error message:

    mainwindow.cpp:180:14: error: 'QCoreApplication' has not been declared
    if (!QCoreApplication::arguments().contains(QStringLi teral("--no_render_alpha")))


    My configuration looks as following :

    Qt Code:
    1. ./configure -prefix /home/marek/TDIR \
    2. -extprefix /home/marek/INSTDIR \
    3. -hostprefix /home/marek/TOOLSDIR \
    4. -release \
    5. -qpa \
    6. -eglfs \
    7. -opengl es2 \
    8. -no-wayland \
    9. -no-accessibility \
    10. -device linux-imx53qsb-g++ -device-option CROSS_COMPILE=arm-guf-linux-gnueabi- -sysroot /projects/Amuse/guf.sdk/sysroots/armv7a-vfp-neon-guf-linux-gnueabi \
    11. -opensource -confirm-license \
    12. -make libs \
    13. -skip qtwebengine \
    14. -make examples \
    15. -no-cups -no-dbus -no-glib \
    16. -no-pch -no-nis -no-accessibility -no-gtkstyle \
    17. -no-xcb -v
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    Error contex you can find in an attachment

    Could please give me any hint what is missing ?
    Attached Files Attached Files

  2. #2
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    Default Re: [ Qt 5.6 ] Examples compilation error 'QCoreApplication'

    The error sounds like you are missing the include for QCoreApplication in your mainwindow.cpp

    Cheers,
    _

  3. #3
    Join Date
    Dec 2015
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    Qt products
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    Platforms
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    Default Re: [ Qt 5.6 ] Examples compilation error 'QCoreApplication'

    Hi,

    Does your .pro file similar to this?

    ---------------------------------------------------------------
    QT += core gui
    greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

    ---------------------------------------------------------------

    And main.cpp

    -------------------------------
    #include "mainwindow.h"
    #include <QApplication>
    #include <QTextCodec>
    #include <QWSServer>
    #include <unistd.h>
    -------------------------------

    Kind Regards

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