Hey there! Let’s walk through this clearly—you don’t need to mess with the raw Cellar directory, and we can set this up to work across platforms too. Here’s what to do:

1. Don’t Link Directly to /opt/Homebrew/Cellar/gtkmm #

Homebrew creates stable symlinks to the latest installed version of GTKMM in /opt/homebrew/include and /opt/homebrew/lib (this is the standard path for ARM Macs; Intel Macs use /usr/local instead). The Cellar folder holds version-specific directories (like /opt/homebrew/Cellar/gtkmm/4.10.0), which will break your config if you update GTKMM later. Stick to the symlinked paths for reliability.

2. Use pkg-config for Hassle-Free Configuration #

The easiest way to handle compilation and linking (and keep things cross-platform) is to use pkg-config—a tool that automatically fetches the correct compiler flags and library links for GTKMM. Homebrew installs this alongside GTKMM, so it’s ready to use.

Step 1: Verify pkg-config Can Find GTKMM #

First, open your terminal and run:

pkg-config gtkmm-4.0 --cflags --libs

You should see output like -I/opt/homebrew/include/gtkmm-4.0 ... -lgtkmm-4.0—if not, add Homebrew’s pkg-config path to your shell profile (.zshrc or .bash_profile):

echo 'export PKG_CONFIG_PATH="/opt/homebrew/lib/pkgconfig:$PKG_CONFIG_PATH"' >> ~/.zshrc
source ~/.zshrc

Restart VS Code after this so it picks up the updated environment.

Step 2: Configure c_cpp_properties.json (For IntelliSense) #

This file tells VS Code’s IntelliSense where to find GTKMM headers. Update it with these settings:

{
    "configurations": [
        {
            "name": "Mac ARM",
            "includePath": [
                "${workspaceFolder}/**",
                "/opt/homebrew/include/**"
            ],
            "compilerPath": "/opt/homebrew/bin/g++",
            "cppStandard": "c++17",
            "intelliSenseMode": "macos-gcc-arm64"
        }
    ],
    "version": 4
}

The /opt/homebrew/include/** wildcard covers all Homebrew-installed headers, so you won’t need to add individual GTKMM subdirectories manually.

Step 3: Configure tasks.json (For Building) #

This file defines your build command. Use pkg-config to inject the correct flags automatically:

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "Build GTKMM App",
            "type": "shell",
            "command": "g++ ${file} -o ${fileDirname}/${fileBasenameNoExtension} $(pkg-config gtkmm-4.0 --cflags --libs)",
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "problemMatcher": ["$gcc"],
            "detail": "Compiles GTKMM app using pkg-config for auto flags"
        }
    ]
}

Now when you press Cmd+Shift+B, VS Code will build your app with all the correct GTKMM links.

3. Cross-Platform Compatibility Tips #

• Linux: On most distros, install GTKMM via your package manager (e.g., sudo apt install libgtkmm-4.0-dev), and pkg-config will work out of the box—no changes to the tasks.json needed.
• Windows: Use a package manager like vcpkg to install GTKMM (vcpkg install gtkmm:x64-windows). Then update the task command to point to vcpkg’s pkg-config (e.g., $(C:/vcpkg/scripts/buildsystems/pkg-config.exe gtkmm-4.0 --cflags --libs)).

By relying on pkg-config instead of hardcoding paths, your config will adapt to different OSes automatically.

内容的提问来源于stack exchange，提问作者DischordDynne