Пример конфигурационного файла c_cpp_properties.json для vscode-cpptools - Microsoft C/C++ расширения для VS Code.

c_cpp_properties.json

{
    "configurations": [
        {
            "name": "Mac",
            "includePath": [
                "${workspaceFolder}/src/**",
                "${workspaceFolder}/vendor/"                                
            ],
            "defines": [],
            "macFrameworkPath": [
                "/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks"
            ],
            "compilerPath": "/usr/bin/clang",
            "cStandard": "c11",
            "cppStandard": "c++17",
            "intelliSenseMode": "clang-x64",
            "compileCommands": "${workspaceFolder}/build/compile_commands.json",
            "browse": {
                "path": [
                    "/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include"
                ],
                "limitSymbolsToIncludedHeaders": true
            }
        }
    ],
    "version": 4
}