no CMAKE_CXX_COMPILER

m5p3nc3r

Hi Guys

After coming back from Embedded World, and not having used QT for over 15 years, I though I'd give it a look again.

I installed QtCreator using the qt-inline-installer-windows-arm64-4.9.0, which I believe is the latest, and created a test project using the new project wizard.

I get the following 'Issues':

C:\Users\matth\projects\QT_Test\CMakeLists.txt:3: error: No CMAKE_CXX_COMPILER could be found.

Tell CMake where to find the compiler by setting either the environment
variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
to the compiler, or to the compiler name if it is in the PATH.
:-1: error: The command "C:\Qt\Tools\CMake\bin\cmake.exe -S C:/Users/matth/projects/QT_Test -B C:/Users/matth/projects/QT_Test/build/Desktop_Qt_6_8_2_MSVC2022_ARM64-Debug" terminated with exit code 1.
:-1: error: CMake project configuration failed. No CMake configuration for build type "Debug" found. Check General Messages for more information.

Having done some investigation, I can see the compiler listed under the Kits

And I can also see a compiler listed under the current kit configuration

The compilers were installed using the MSFT Visual Studio Installer app, and are all up to date.

Your help is appreciated!

Christian Ehrlicher

Move your mouse over the yellow exclamation mark to see what is wrong.

m5p3nc3r

I get this:

But its not telling me anything about how to fix it. Does the MSVC toolchain not have a valid C/C++ compiler in it? If not, where do I get one from for Windows (I a linux developer, not sure I'm enjoying the windows development world!)

Christian Ehrlicher

@m5p3nc3r said in no CMAKE_CXX_COMPILER:

But its not telling me anything about how to fix it.

Look at this configuration and see if the paths are correct would be a start.

m5p3nc3r

Sorry - which configuration?

m5p3nc3r

I have checked the location of the auto-detected c/c++ compilers and they seem to be correct.

m5p3nc3r

Some posts I'm finding suggest that CMake needs to be run from a 'Visual Studio Command Prompt'. But I don't have VS installed, just the toolchain components from the VS Installer app. I do have VS Code installed, but that doesn't have the option of a 'Command Prompt'.

I have spent way too much time on trying to get a simple QT 'Hello World' app running here :o(

cristian-adam

Qt Creator will use the vcvars*.bat files to determine the environment for the Visual C++ compiler. Running these vcvars*.bat files takes time and therefore they are done asynchronously.

Unfortunately Microsoft is doing updates pretty often and Qt Creator sometimes needs a little "push" to get things right. In Preferences > Kits > Compilers do the following:

Click on Remove All
Click on Re-detect
Restart Qt Creator and wait a few minutes until the detection has been done.

Alternatively you can install the free compiler option (MinGW) which doesn't have this issue.

m5p3nc3r

Ok, thanks for the feedback. I tried your approach, but it didn't seem to work for me. Waited over 10 minutes, but still nothing.

I am going to try the MinGW route - this is a tool I haven't used in /forever/!!

m5p3nc3r

MinGW was a no-go. I think it doesn't like windows on arm... So last attempt - wsl2 and ubuntu... Installing now - fingers crossed!

m5p3nc3r

WSL is my friend - this worked for me.

Thanks to everybody for your help in this thread. Now to try and create something :o)