<![CDATA[QLibrary: isLoaded() not matching!]]>Here is a simple example of my main C++ application that loads my custom shared library called "mylib.so.1.0.0" that is placed in the same folder of the main application.
The wired thing is that: In the console output it said that the mylib was not loaded, but it can call and execute the run() function that is inside the shared library.

    QLibrary mylib("./mylib");

    std::cout << "Is Loaded: " << mylib.isLoaded() << std::endl;
    std::cout << mylib.errorString().toStdString() << std::endl;

    typedef void (*func_run)(void);

    func_run run = (func_run) mylib.resolve("run");

    if (run == NULL) {
        std::cerr << "[API ERROR]: Unable to load the run() function!" << std::endl;
        exit(1);
    }

    run(); // WORKS GOOD!

Console Output:

Is Loaded: 0   // <-- WHY?
Unknown error
Shared Library: Inside the RUN() function

My System:

  • Ubuntu 20.04 x64
  • CMake 3.16.3
  • g++ 9.3
  • Qt 5.15.1
]]>https://forum.qt.io/topic/119883/qlibrary-isloaded-not-matchingRSS for NodeSun, 16 Aug 2026 01:28:00 GMTTue, 13 Oct 2020 01:46:19 GMT60<![CDATA[Reply to QLibrary: isLoaded() not matching! on Tue, 13 Oct 2020 01:49:32 GMT]]>@fem_dev I solve...To get a right result of isLoaded() you must call load() before it!

]]>https://forum.qt.io/post/621911https://forum.qt.io/post/621911Tue, 13 Oct 2020 01:49:32 GMT<![CDATA[Reply to QLibrary: isLoaded() not matching! on Tue, 13 Oct 2020 02:08:00 GMT]]>@fem_dev

To get a right result of isLoaded() you must call load() before it!

I think that's not true, the result of isLoaded() is right during the whole time.
When you haven't called load(), it is not loaded, so isLoaded() should return false.

]]>https://forum.qt.io/post/621913https://forum.qt.io/post/621913Tue, 13 Oct 2020 02:08:00 GMT<![CDATA[Reply to QLibrary: isLoaded() not matching! on Tue, 13 Oct 2020 01:49:32 GMT]]>@fem_dev I solve...To get a right result of isLoaded() you must call load() before it!

]]>https://forum.qt.io/post/621911https://forum.qt.io/post/621911Tue, 13 Oct 2020 01:49:32 GMT