Intellisense not recognising CMake compiler defines

[daldr-ntml]

Hi, I'm using CMake Presets with vscode-cmake-tools. My selected preset applies compiler defines using target_compile_definitions() but VS Code Intellisense is not recognising those defines.

Do I have to specify the defines explicitly in c_cpp_properties.json or should vscode-cmake-tools detect and apply them automatically?

(I am running on Windows but using an ARM cross-compiler).

[elahehrashedi]

vscode-cmake-tools should detect and apply defines automatically. But it looks like for your source file it is not being applied.
I recommend you open the source file that is not configured properly and Run CMake: log Diagnostics on that and share the log with us.

[daldr-ntml]

@elahehrashedi Thanks for your answer. Here is the log you requested:

{
  "os": "win32",
  "vscodeVersion": "1.67.1",
  "cmtVersion": "1.10.5",
  "configurations": [
    {
      "folder": "c:\\SVNProj\\<snip>\\software\\elysion_arm",
      "cmakeVersion": "3.22.2",
      "configured": true,
      "generator": "Unix Makefiles",
      "usesPresets": true,
      "compilers": {}
    }
  ],
  "cpptoolsIntegration": {
    "isReady": true,
    "hasCodeModel": true,
    "activeBuildType": "Release",
    "buildTypesSeen": [
      "Release"
    ],
    "requests": [],
    "responses": [],
    "partialMatches": [],
    "targetCount": 1,
    "executablesCount": 1,
    "librariesCount": 0,
    "targets": [
      {
        "name": "elysion_arm",
        "type": "EXECUTABLE"
      }
    ]
  },
  "settings": [
    {
      "communicationMode": "automatic",
      "useCMakePresets": "auto",
      "configureOnOpen": true
    }
  ]
}

[bobbrow]

Cpptools hasn't requested any IntelliSense configuration information from us. Two questions:

• Did you have the file open in the editor when you ran the Log Diagnostics command?
• Did you set CMake Tools as the configuration provider for cpptools? (if not, you can use the C/C++: Change Configuration Provider command to set it to CMake Tools)

[daldr-ntml]

@bobbrow Thanks for your help. I have now set CMake Tools as the configuration provider for cpptools and IntelliSense is working as expected, i.e. it is disabling/enabling code according to my compiler defines.

The Output window shows:

[13/05/2022, 08:31:19] Unable to resolve configuration with compilerPath "c:/program files/arm/development studio 2021.1/sw/armcompiler6.16/bin/armclang.exe". Using "cl.exe" instead.

though armclang.exe is present at that path. But Intellisense seems ok.

Thanks again.

[bobbrow]

Awesome! Glad it's working now. Cpptools isn't currently able to query the Keil compiler (related: microsoft/vscode-cpptools#3222), so it picks a compiler that it knows so that you can get *some* IntelliSense for the standard headers. If you need something more GCC-like, I believe you can override the compilerPath in c_cpp_properties.json and it should pick that alternate compiler instead.

[daldr-ntml]

@bobbrow Thanks for that link. These VS Code extensions are so useful and powerful, but it's difficult to remember all the details of how to configure them!