Node Gyp

node-gyp: Native Node.js Addon Building

node-gyp compiles C/C++ code into native Node.js modules (.node files). It uses GYP configuration to create platform-specific build files.

Build Pipeline: binding.gyp → configure → platform build files → compile → .node binary

Key Concepts

Native Addons

Binary modules providing Node.js bindings to C/C++ libraries. Compiled for specific:

• Node.js versions (each has a MODULE_VERSION number)
• Platforms (Linux, macOS, Windows)
• Architectures (x64, arm64, ia32)

binding.gyp

Configuration file defining how to build your addon. JSON-like syntax with GYP features.

N-API (Node-API)

ABI-stable API for native addons. Modules work across Node.js versions without recompiling. Always use for new projects.

Variable Expansion

• <(var) - String expansion
• <@(var) - List expansion
• <!(cmd) - Command output as string
• <!@(cmd) - Command output as list

Platform Setup

Linux:

sudo apt-get install build-essential python3

macOS:

xcode-select --install

Windows (choose one):

# Option 1: Chocolatey (recommended)
choco install python visualstudio2022-workload-vctools -y

# Option 2: npm (requires admin PowerShell)
npm install --global --production windows-build-tools

Essential Commands

# Clean rebuild (most common)
node-gyp rebuild

# Individual steps (for debugging)
node-gyp clean       # Remove build artifacts
node-gyp configure   # Generate build files
node-gyp build       # Compile the addon

# Parallel compilation (faster)
node-gyp rebuild -j max

# Debug build
node-gyp rebuild --debug

# Download Node.js headers
node-gyp install

When to use each:

• rebuild - Default choice, ensures clean build
• configure then build - When iterating on binding.gyp
• clean - When switching Node versions or architectures
• install - When headers are missing or corrupted

Basic binding.gyp

{
  "targets": [{
    "target_name": "addon",
    "sources": ["src/addon.cc"],
    "include_dirs": [
      "<!@(node -p \"require('node-addon-api').include\")"
    ],
    "defines": ["NAPI_DISABLE_CPP_EXCEPTIONS"],
    "cflags!": ["-fno-exceptions"],
    "cflags_cc!": ["-fno-exceptions"]
  }]
}

Key fields:

• target_name - Output filename (addon.node)
• sources - C/C++ source files
• include_dirs - Header search paths
• defines - Preprocessor definitions
• cflags! / cflags_cc! - Remove default flags (! means remove)

N-API Setup (Recommended)

package.json:

{
  "dependencies": {
    "node-addon-api": "^7.0.0"
  },
  "scripts": {
    "install": "node-gyp rebuild"
  }
}

binding.gyp:

{
  "targets": [{
    "target_name": "addon",
    "sources": ["src/addon.cc"],
    "include_dirs": [
      "<!@(node -p \"require('node-addon-api').include\")"
    ],
    "dependencies": [
      "<!(node -p \"require('node-addon-api').gyp\")"
    ],
    "defines": ["NAPI_DISABLE_CPP_EXCEPTIONS"]
  }]
}

Quick Troubleshooting Decision Tree

Build failed?
│
├─ Python error?
│  └─ npm config set python /usr/bin/python3
│
├─ Visual Studio error? (Windows)
│  └─ node-gyp rebuild --msvs_version=2022
│
├─ NODE_MODULE_VERSION mismatch?
│  └─ npm rebuild
│
├─ Architecture mismatch? (M1/M2 Mac)
│  └─ rm -rf node_modules && npm install
│
├─ Missing headers?
│  └─ node-gyp install
│
├─ Compilation/linking error?
│  └─ Check binding.gyp libraries, run with --verbose
│
└─ Still failing?
   └─ See references/troubleshooting.md for detailed solutions

References

For detailed guidance on specific topics:

• references/troubleshooting.md - Comprehensive troubleshooting for all common errors with symptoms, solutions, and explanations
• references/advanced-patterns.md - Platform-specific configurations, Electron support, pre-built binaries, cross-compilation
• references/best-practices.md - Production recommendations, CI/CD setup, flags reference, related resources

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