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Editorial Team
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Asked: 2026-06-01T09:07:56+00:00

I have to set up a Qt development environment for my GUI class. I

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I have to set up a Qt development environment for my GUI class. I am working through a tutorial and was instructed to include the <QTCore/QFile> header in my implementation file. However, I cannot build the project because the above header file is not found.

I am not sure what I am missing here — I installed Qt-Creator and all of the deps from the Debian package manager (currently using Wheezy). The Qt 4.7 documentation in IDE also has a section on the above header files, and yet it can’t seem to locate them… odd.

NOTE: Header should have read <QtCore/QFile>.

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1 Answer

  1. Editorial Team
    1. Just #include <QFile> will be more compatible with Qt5. Also note the capital T you have, it should have been #include <QtCore/QFile> – remember unix/linux file systems are case sensitive.
    2. You looked at the library file, not the include files. Those are different things in C/C++.
    3. As trojanfoe correctly mentioned – you are probably missing the development packages of Qt4.
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