Unable to find header without extension (like QWidget)

[kerim371]

Hi,

I'm trying to #include <QWidget> while #include <qwidget.h> works without problems.
Here is configuration file c_cpp_properties.json:

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/**",
                "${workspaceFolder}/../../Qt/5.15.2/gcc_64/include/**",
            ],
            "defines": [],
            "compilerPath": "/usr/bin/gcc",
            "cStandard": "gnu17",
            "cppStandard": "gnu++14",
            "intelliSenseMode": "linux-gcc-x64",
            "configurationProvider": "ms-vscode.cmake-tools"
        }
    ],
    "version": 4
}

screen for QWidget:

and for qwidget.h:

[sean-mcmanus]

What does the squiggle/error say, i.e. what header can't be found?

If you run C/C++: Log Diagnostics, is the path for the missing header shown in the Includes list?

[kerim371]

@sean-mcmanus hi,

The squiggle error say:

If you run C/C++: Log Diagnostics, is the path for the missing header shown in the Includes list?

How to do that? Following to this instruction I've set C_Cpp: Logging Level to `Warning. What do I have to do next?

Also I just created the default Qt project+CMake and for this project there is no such problem with including <QWidget> and other headers.
But my original CMake project is pretty big (the build folder weigh about 30 gygabite) and there I experience described problem

[sean-mcmanus]

The C/C++: Log Diagnostics command is from the VS Code View->Command palette. Your database might be corrupt, potentially causing the recursive includes feature to not be able to find all the include paths -- can you try running the C/C++: Reset IntelliSense Database command to see if that fixes it?

[kerim371]

@sean-mcmanus sorry it took so long to do that,
Log Diagnostics output:

-------- Diagnostics - 10/15/2021, 8:04:27 PM
Version: 1.7.0
Current Configuration:
{
    "name": "Linux",
    "includePath": [
        "${workspaceFolder}/**",
        "/home/user/Qt/5.15.2/gcc_64/include/**"
    ],
    "defines": [],
    "compilerPath": "/usr/bin/gcc",
    "cStandard": "gnu17",
    "cppStandard": "gnu++14",
    "intelliSenseMode": "linux-gcc-x64",
    "configurationProvider": "ms-vscode.cmake-tools",
    "compilerPathIsExplicit": true,
    "cStandardIsExplicit": true,
    "cppStandardIsExplicit": true,
    "intelliSenseModeIsExplicit": true,
    "macFrameworkPath": [],
    "forcedInclude": [],
    "compilerArgs": [],
    "mergeConfigurations": false,
    "browse": {
        "path": [
            "${workspaceFolder}/**",
            "/home/user/Qt/5.15.2/gcc_64/include/**"
        ],
        "limitSymbolsToIncludedHeaders": true
    }
}
Custom browse configuration: 
{
    "browsePath": [
        "/home/user/Documents/Colada/d/slicersources-build/CMakeFiles",
        "/home/user/Documents/Colada/d/slicersources-build/CTK-prefix/src/CTK-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/CTKAPPLAUNCHER-prefix/src/CTKAPPLAUNCHER-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/CTKAppLauncherLib-prefix/src/CTKAppLauncherLib-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/CompareVolumes-prefix/src/CompareVolumes-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/DCMTK-prefix/src/DCMTK-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/DataStore-prefix/src/DataStore-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/Eigen3-prefix/src/Eigen3-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/GDAL-prefix/src/GDAL-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/HDF5-prefix/src/HDF5-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/ITK-prefix/src/ITK-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/JsonCpp-prefix/src/JsonCpp-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/LZMA-prefix/src/LZMA-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/LibArchive-prefix/src/LibArchive-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/MultiVolumeExplorer-prefix/src/MultiVolumeExplorer-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/MultiVolumeImporter-prefix/src/MultiVolumeImporter-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/OpenSSL-prefix/src/OpenSSL-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/RapidJSON-prefix/src/RapidJSON-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/Slicer-prefix/src/Slicer-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/SlicerExecutionModel-prefix/src/SlicerExecutionModel-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/SurfaceToolbox-prefix/src/SurfaceToolbox-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/VTK-prefix/src/VTK-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/bzip2-prefix/src/bzip2-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/curl-prefix/src/curl-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/h5geo-prefix/src/h5geo-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/h5gt-prefix/src/h5gt-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/jqPlot-prefix/src/jqPlot-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/julia-prefix/src/julia-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/julia-packages-prefix/src/julia-packages-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/magic_enum-prefix/src/magic_enum-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-prefix/src/python-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-dicom-requirements-prefix/src/python-dicom-requirements-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-ensurepip-prefix/src/python-ensurepip-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-extension-manager-requirements-prefix/src/python-extension-manager-requirements-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-extension-manager-ssl-requirements-prefix/src/python-extension-manager-ssl-requirements-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-numpy-prefix/src/python-numpy-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-packages-prefix/src/python-packages-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-pip-prefix/src/python-pip-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-pythonqt-requirements-prefix/src/python-pythonqt-requirements-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-requests-requirements-prefix/src/python-requests-requirements-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-scipy-prefix/src/python-scipy-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-setuptools-prefix/src/python-setuptools-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-source-prefix/src/python-source-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/python-wheel-prefix/src/python-wheel-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/qRestAPI-prefix/src/qRestAPI-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/sqlite-prefix/src/sqlite-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/tbb-prefix/src/tbb-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/teem-prefix/src/teem-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/units-prefix/src/units-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/vtkAddon-prefix/src/vtkAddon-stamp",
        "/home/user/Documents/Colada/d/slicersources-build/zlib-prefix/src/zlib-stamp"
    ],
    "compilerPath": "/bin/x86_64-linux-gnu-g++-9",
    "compilerArgs": []
}
Translation Unit Mappings:
[ /home/user/Documents/Colada/d/slicersources-src/Libs/MRML/Core/vtkMRMLDiffusionWeightedVolumeNode.h ]:
    /home/user/Documents/Colada/d/slicersources-src/Libs/MRML/Core/vtkMRMLDiffusionWeightedVolumeNode.h
[ /home/user/Documents/Colada/d/slicersources-src/Libs/MRML/Core/vtkMRMLDisplayableHierarchyNode.cxx ]:
    /home/user/Documents/Colada/d/slicersources-src/Libs/MRML/Core/vtkMRMLDisplayableHierarchyNode.cxx
[ /home/user/Documents/Colada/d/slicersources-src/Libs/MRML/Core/vtkMRMLNode.cxx ]:
    /home/user/Documents/Colada/d/slicersources-src/Libs/MRML/Core/vtkMRMLNode.cxx
[ /home/user/Documents/Colada/Applications/ColadaApp/qColadaAppMainWindow.cxx ]:
    /home/user/Documents/Colada/Applications/ColadaApp/qColadaAppMainWindow.cxx
Translation Unit Configurations:
[ /home/user/Documents/Colada/d/slicersources-src/Libs/MRML/Core/vtkMRMLDiffusionWeightedVolumeNode.h ]:
    Process ID: 4774
    Memory Usage: 115 MB
    Compiler Path: /bin/x86_64-linux-gnu-g++-9
    Includes:
        /usr/include/c++/9
        /usr/include/x86_64-linux-gnu/c++/9
        /usr/include/c++/9/backward
        /usr/lib/gcc/x86_64-linux-gnu/9/include
        /usr/local/include
        /usr/include/x86_64-linux-gnu
        /usr/include
    Standard Version: c++17
    IntelliSense Mode: linux-gcc-x64
    Other Flags:
        --g++
        --gnu_version=90300
        --header_only_fallback
[ /home/user/Documents/Colada/d/slicersources-src/Libs/MRML/Core/vtkMRMLDisplayableHierarchyNode.cxx ]:
    Process ID: 4801
    Memory Usage: 161 MB
    Compiler Path: /bin/x86_64-linux-gnu-g++-9
    Includes:
        /usr/include/c++/9
        /usr/include/x86_64-linux-gnu/c++/9
        /usr/include/c++/9/backward
        /usr/lib/gcc/x86_64-linux-gnu/9/include
        /usr/local/include
        /usr/include/x86_64-linux-gnu
        /usr/include
    Standard Version: c++17
    IntelliSense Mode: linux-gcc-x64
    Other Flags:
        --g++
        --gnu_version=90300
[ /home/user/Documents/Colada/d/slicersources-src/Libs/MRML/Core/vtkMRMLNode.cxx ]:
    Process ID: 14647
    Memory Usage: 201 MB
    Compiler Path: /bin/x86_64-linux-gnu-g++-9
    Includes:
        /usr/include/c++/9
        /usr/include/x86_64-linux-gnu/c++/9
        /usr/include/c++/9/backward
        /usr/lib/gcc/x86_64-linux-gnu/9/include
        /usr/local/include
        /usr/include/x86_64-linux-gnu
        /usr/include
    Standard Version: c++17
    IntelliSense Mode: linux-gcc-x64
    Other Flags:
        --g++
        --gnu_version=90300
[ /home/user/Documents/Colada/Applications/ColadaApp/qColadaAppMainWindow.cxx ]:
    Process ID: 72626
    Memory Usage: 60 MB
    Compiler Path: /bin/x86_64-linux-gnu-g++-9
    Includes:
        /usr/include/c++/9
        /usr/include/x86_64-linux-gnu/c++/9
        /usr/include/c++/9/backward
        /usr/lib/gcc/x86_64-linux-gnu/9/include
        /usr/local/include
        /usr/include/x86_64-linux-gnu
        /usr/include
    Standard Version: c++17
    IntelliSense Mode: linux-gcc-x64
    Other Flags:
        --g++
        --gnu_version=90300
Total Memory Usage: 537 MB

------- Workspace parsing diagnostics -------
Number of files discovered (not excluded): 4001

It seems that C/C++: Reset IntelliSense Database didn't help.

I don't know why but now I can't even include qwidget.h.

I believe that the project is pretty complicated, it uses CMake and superbuild. May that bring some overheads?

[kerim371]

I have an executable. It is located in /home/user/Documents/Colada/d/Slicer-build/Colada
I have .cmake/api/v1/reply but there is no any .cxx file

[bobbrow]

Is it this project? https://github.com/tierra-colada/Colada
I can take a look and see what's going on.

[kerim371]

Yes, that is.
To build it you need Qt and than simply execute cmake .. -DQt_DIR=.... There should be problems with building on Windows or Ubuntu but on Mac I expect it won't be built.
If you use Mac then you probably should build the raw core of Colada https://github.com/Slicer/Slicer
It is more stable and has the same structure -> thus the current problem should also exist

[bobbrow]

The problem is that there are no source files listed in the cmake-file-api. This project uses the SuperBuild pattern and it appears that CMake doesn't give us any information about source files in this case (or we don't know where to find it). I searched for qSlicerApplication.cxx and qColadaAppMainWindow.cxx in the build files (including the cmake-file-api) and each was only listed in a CMakeLists.txt and nowhere else. I'll open a bug and ask CMake if they can support this type of project.

[bobbrow]

https://gitlab.kitware.com/cmake/cmake/-/issues/22826