Compile definitions are not detected by Intellisense

Brief Issue Summary

I defined SING_PLATFORM_APPLE and use it like this:

#ifndef SING_PLATFORM_APPLE
    #error Sing only supports Apple platforms
#endif

Code works with no problems.

Intellisense should grey out the block since preprocessor will never reach that line.
But it's not. Also VSCode adds squiggly line under that #error directive, which is a good feature if Intellisense worked correctly.

My CMakeLists.txt below:

add_library(sing SHARED src/Application.cpp)
target_include_directories(sing PRIVATE "${PROJECT_SOURCE_DIR}/include/sing")

if(APPLE)
    target_compile_definitions(sing PRIVATE SING_PLATFORM_APPLE)
endif()

CMake Tools Diagnostics

{
  "os": "darwin",
  "vscodeVersion": "1.79.2",
  "cmtVersion": "1.14.33",
  "configurations": [
    {
      "folder": "/Users/derin/Projects/Learning/sing",
      "cmakeVersion": "3.26.4",
      "configured": true,
      "generator": "Ninja",
      "usesPresets": false,
      "compilers": {
        "C": "/usr/bin/clang",
        "CXX": "/usr/bin/clang++"
      }
    }
  ],
  "cpptoolsIntegration": {
    "isReady": true,
    "hasCodeModel": true,
    "activeBuildType": "Debug",
    "buildTypesSeen": [
      "Debug"
    ],
    "requests": [
      "file:///Users/derin/Projects/Learning/sing/include/sing/Core.h"
    ],
    "responses": [],
    "partialMatches": [],
    "targetCount": 2,
    "executablesCount": 1,
    "librariesCount": 1,
    "targets": [
      {
        "name": "sandbox",
        "type": "EXECUTABLE"
      },
      {
        "name": "sing",
        "type": "SHARED_LIBRARY"
      }
    ]
  },
  "settings": [
    {
      "communicationMode": "automatic",
      "useCMakePresets": "auto",
      "configureOnOpen": false
    }
  ]
}

Debug Log

[main] Building folder: sing 
[main] Saving open files before configure/build
[build] Starting build
[driver] Start build all
[proc] Executing command: /opt/homebrew/bin/cmake --build /Users/derin/Projects/Learning/sing/build --config Debug --target all --
[proc]   with environment: {"ANDROID_HOME":"/Users/derin/Library/Android/sdk","COMMAND_MODE":"unix2003","HOME":"/Users/derin","HOMEBREW_CELLAR":"/opt/homebrew/Cellar","HOMEBREW_PREFIX":"/opt/homebrew","HOMEBREW_REPOSITORY":"/opt/homebrew","INFOPATH":"/opt/homebrew/share/info:","LOGNAME":"derin","MANPATH":"/Users/derin/.nvm/versions/node/v16.15.1/share/man:/opt/homebrew/share/man::","MallocNanoZone":"0","NVM_BIN":"/Users/derin/.nvm/versions/node/v16.15.1/bin","NVM_CD_FLAGS":"-q","NVM_DIR":"/Users/derin/.nvm","NVM_INC":"/Users/derin/.nvm/versions/node/v16.15.1/include/node","OLDPWD":"/","ORIGINAL_XDG_CURRENT_DESKTOP":"undefined","PATH":"/Users/derin/.nvm/versions/node/v16.15.1/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/share/dotnet:~/.dotnet/tools:/Library/Apple/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Users/derin/.cargo/bin:/Users/derin/Library/Application Support/JetBrains/Toolbox/scripts:/Users/derin/development/flutter/bin:/Users/derin/Library/Android/sdk/cmdline-tools:/Users/derin/.pub-cache/bin:/Users/derin/Applications/Julia-1.8.app/Contents/Resources/julia/bin","PROMPT":"[%*] (%n) %~ %% ","PWD":"/","SHELL":"/bin/zsh","SHLVL":"0","SSH_AUTH_SOCK":"/private/tmp/com.apple.launchd.SVFVm6QU9Z/Listeners","TMPDIR":"/var/folders/0v/g7t56xl933v5_2m7ntkr_ktw0000gn/T/","USER":"derin","VSCODE_AMD_ENTRYPOINT":"vs/workbench/api/node/extensionHostProcess","VSCODE_CODE_CACHE_PATH":"/Users/derin/Library/Application Support/Code/CachedData/695af097c7bd098fbf017ce3ac85e09bbc5dda06","VSCODE_CRASH_REPORTER_PROCESS_TYPE":"extensionHost","VSCODE_CWD":"/","VSCODE_HANDLES_UNCAUGHT_ERRORS":"true","VSCODE_IPC_HOOK":"/Users/derin/Library/Application Support/Code/1.79-main.sock","VSCODE_NLS_CONFIG":"{\"locale\":\"en-gb\",\"osLocale\":\"en-gb\",\"availableLanguages\":{},\"_languagePackSupport\":true}","VSCODE_PID":"840","XPC_FLAGS":"0x0","XPC_SERVICE_NAME":"application.com.microsoft.VSCode.18722886.18722892","_":"/Applications/Visual Studio Code.app/Contents/MacOS/Electron","__CFBundleIdentifier":"com.microsoft.VSCode","__CF_USER_TEXT_ENCODING":"0x1F5:0x0:0x2","ELECTRON_RUN_AS_NODE":"1","VSCODE_L10N_BUNDLE_LOCATION":"","APPLICATION_INSIGHTS_NO_DIAGNOSTIC_CHANNEL":"1","NINJA_STATUS":"[%s/%t %p :: %e] "}
[build] ninja: no work to do.
[driver] Build completed: 00:00:00.049
[cmakefileapi-parser] Read reply folder: /Users/derin/Projects/Learning/sing/build/.cmake/api/v1/reply
[cmakefileapi-parser] Found index files: ["cache-v2-88feed7812447a669c19.json","cmakeFiles-v1-401ca402ac870d3dfe72.json","codemodel-v2-d15d2ebdca757724d43c.json","directory-.-Debug-f5ebdc15457944623624.json","directory-apps.sandbox-Debug-9ed6ceb98e8e81bbbb11.json","index-2023-06-21T04-51-11-0776.json","target-sandbox-Debug-11d90892905e1f15895e.json","target-sing-Debug-5429c7baae0aa883f32c.json","toolchains-v1-5e618a28b507f347811e.json"]
[cache] Reading CMake cache file /Users/derin/Projects/Learning/sing/build/CMakeCache.txt
[cache] Parsing CMake cache string
[build] Build finished with exit code 0
[extension] [4899] cmake.build finished (returned 0)

Additional Information

My folder structure (if it helps)

.gitignore
CMakeLists.txt
[apps]
    └── [sandbox]
        ├── CMakeLists.txt
        └── main.cpp
[include]
    ├── Sing.h
    └── [sing]
        ├── Application.h
        └── Core.h
[src]
    └── Application.cpp

Start with the project’s CMakeLists.txt and include/sing/Core.h, then reproduce the configuration on macOS using the reported VS Code, CMake Tools, and Ninja versions. Trace how target_compile_definitions from the CMake code model are passed to IntelliSense; done means SING_PLATFORM_APPLE is recognized and the guarded block is greyed out without a spurious #error squiggle.