Visual Studio Cannot open include file 'QtConcurrent'L No such file or directory

ConorCodes

Hello,

I am having an issue building a project I have taken over from another developer.

I am using Visual Studio 2019 with Qt 6.2.0 and receive the error Cannot open include file: 'QtConcurrent': No such file or directory when I try build the project. The #include <QtConcurrent> in my source file is highlighted.

So far I have added concurrent to the Qt Modules under Qt Project Settings.
Also under C/C++ -> Command line in the All Options "C:\Qt\6.2.0\msvc2019_64\include\QtConcurrent" exists.

I was wondering if anyone could help me discover what I am missing please?

Thanks,

n-2204

@ConorCodes May be you can try this-> Right click on project on visual studio -> click properties (on the bottom) -> go to C/C++ -> all options -> find additional include directories and there add path to your QT include folder

KroMignon

@ConorCodes said in Visual Studio Cannot open include file 'QtConcurrent'L No such file or directory:

I was wondering if anyone could help me discover what I am missing please?

Do you have add QtConcurrent package in your project?
For qmake project add QT += concurrent in PRO file
For cmake, add following in CMakeLists.txt:

find_package(Qt6 COMPONENTS Concurrent REQUIRED)
target_link_libraries(mytarget PRIVATE Qt6::Concurrent)

cf: https://doc.qt.io/qt-6/qtconcurrent.html

ConorCodes

@KroMignon said in Visual Studio Cannot open include file 'QtConcurrent'L No such file or directory:

QT += concurrent

Hello KroMignon,

Thank you for your response.

I am using qmake to build my Visual Studio project, do you know where I can find the correct .pro file?

I tried to add QT += concurrent to QtTestTool\Debug\qmake\temp qtvars.pro is this the correct location as I'm trying to run my program in debug?

Thanks

KroMignon

@ConorCodes said in Visual Studio Cannot open include file 'QtConcurrent'L No such file or directory:

I tried to add QT += concurrent to QtTestTool\Debug\qmake\temp qtvars.pro is this the correct location as I'm trying to run my program in debug?

The PRO file is your project file!!!!

ConorCodes

The solution which solved my issue was editing the VC++ Project file and ensuring that concurrent was in <QtModules> inside each <PropertyGroup>

<PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'" Label="QtSettings">
<QtInstall>Qt 6.2.0</QtInstall>
<QtModules>concurrent;core;gui;widgets</QtModules>
<QtBuildConfig>debug</QtBuildConfig>
</PropertyGroup>