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  • I am trying to compile a github project for Qt, using CMake. Here is the settings:

    034c46ba-3dfb-47e5-a5b0-6c9a24c2014a-image.png ![alt text](image url)

    But I cannot setup a correct QT path: Qt5_DIR-NOTFOUND

    Here is the outcome message:

    CMake Error at CMakeLists.txt:32 (find_package):
      By not providing "FindQt5.cmake" in CMAKE_MODULE_PATH this project has
      asked CMake to find a package configuration file provided by "Qt5", but
      CMake did not find one.
      Could not find a package configuration file provided by "Qt5" with any of
      the following names:
      Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
      to a directory containing one of the above files.  If "Qt5" provides a
      separate development package or SDK, be sure it has been installed.

    I even setup Qt in PATH:


    I always got Qt5_DIR-NOTFOUND as feedback. What should I do in order to overcome this error ?

  • Lifetime Qt Champion


    The PATH environment variable won't help there.

    @Flaviu-0 said in Qt5_DIR-NOTFOUND:

    Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH

    Define it to point to your Qt 5 installation as suggested when calling cmake.

    Or if you also have Qt Creator, just build it using it.

  • @SGaist
    Yes, I have used Qt Creator to compile with CMake, specifically, I have loaded CMakeLists.tzt into Qt Creator, but there I have another troubles:

    Run Build Command(s):C:/Project/ninja-win/ninja.exe cmTC_df434 && [1/2] Building C object CMakeFiles\cmTC_df434.dir\testCCompiler.c.obj
        [2/2] Linking C executable cmTC_df434.exe
        FAILED: cmTC_df434.exe 
        cmd.exe /C "cd . && "C:\Program Files\CMake\bin\cmake.exe" -E vs_link_exe --intdir=CMakeFiles\cmTC_df434.dir --rc=rc --mt=CMAKE_MT-NOTFOUND --manifests  -- C:\PROGRA~2\MICROS~1.0\VC\bin\X86_AM~1\link.exe /nologo CMakeFiles\cmTC_df434.dir\testCCompiler.c.obj  /out:cmTC_df434.exe /implib:cmTC_df434.lib /pdb:cmTC_df434.pdb /version:0.0 /machine:x64  /debug /INCREMENTAL /subsystem:console  kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib && cd ."
        RC Pass 1: command "rc /fo CMakeFiles\cmTC_df434.dir/manifest.res CMakeFiles\cmTC_df434.dir/manifest.rc" failed (exit code 0) with the following output:
        The system cannot find the file specified
        ninja: build stopped: subcommand failed.

    I guess the CMake way it is the easy one.

  • Lifetime Qt Champion

    Your build started correctly.

    Qt Creator uses cmake since it's a cmake project. The main difference is that the paths for Qt are pre-configured so you do not have to worry about that.

    What is failing here is the rc call. How does your CMakeFile.txt look like ?

  • Any hint will be very helpful to me.

  • Lifetime Qt Champion

    It's the rc part that fails. Did you a fresh build from start ?

  • @SGaist Thank you a lot. I have succeeded into compiling that project, using CMake and VS2017.

  • Lifetime Qt Champion

    You're welcome !

    What did you do to succeed ?

  • I have generated VS2017 solution file using CMake, but I get out Qt option, so I am not using Qt right now, just VS2017. Now, I can compile, run and debug reliable this project. Thank you a lot for your support.

  • And another information for those who have the same issue, I noticed that CMake chooses Qt5_DIR with this values:

    b3287b72-9ec4-482f-a89b-50e4384d1235-image.png C:/Qt/Qt5.12.10/5.12.10/msvc2017_64/lib/cmake/Qt5

    Hope it helps.

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