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83 lines
2.2 KiB
83 lines
2.2 KiB
4 years ago
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# Setup
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## Prerequisites
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Before starting to use **N-API** you need to assure you have the following
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prerequisites:
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* **Node.JS** see: [Installing Node.js](https://nodejs.org/)
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* **Node.js native addon build tool**
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- **[node-gyp](node-gyp.md)**
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## Installation and usage
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To use **N-API** in a native module:
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1. Add a dependency on this package to `package.json`:
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```json
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"dependencies": {
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"node-addon-api": "*",
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}
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```
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2. Reference this package's include directory and gyp file in `binding.gyp`:
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```gyp
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'include_dirs': ["<!@(node -p \"require('node-addon-api').include\")"],
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'dependencies': ["<!(node -p \"require('node-addon-api').gyp\")"],
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```
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3. Decide whether the package will enable C++ exceptions in the N-API wrapper.
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The base ABI-stable C APIs do not throw or handle C++ exceptions, but the
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N-API C++ wrapper classes may _optionally_
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[integrate C++ and JavaScript exception-handling
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](https://nodejs.github.io/node-addon-api/class_napi_1_1_error.html).
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To enable that capability, C++ exceptions must be enabled in `binding.gyp`:
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```gyp
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'cflags!': [ '-fno-exceptions' ],
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'cflags_cc!': [ '-fno-exceptions' ],
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'xcode_settings': {
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'GCC_ENABLE_CPP_EXCEPTIONS': 'YES',
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'CLANG_CXX_LIBRARY': 'libc++',
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'MACOSX_DEPLOYMENT_TARGET': '10.7',
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},
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'msvs_settings': {
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'VCCLCompilerTool': { 'ExceptionHandling': 1 },
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},
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```
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Alternatively, disable use of C++ exceptions in N-API:
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```gyp
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'defines': [ 'NAPI_DISABLE_CPP_EXCEPTIONS' ],
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```
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4. If you would like your native addon to support OSX, please also add the
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following settings in the `binding.gyp` file:
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```gyp
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['OS=="mac"', {
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'cflags+': ['-fvisibility=hidden'],
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'xcode_settings': {
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'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES', # -fvisibility=hidden
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}
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}]
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```
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5. Include `napi.h` in the native module code.
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To ensure only ABI-stable APIs are used, DO NOT include
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`node.h`, `nan.h`, or `v8.h`.
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```C++
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#include "napi.h"
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```
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At build time, the N-API back-compat library code will be used only when the
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targeted node version *does not* have N-API built-in.
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The preprocessor directive `NODE_ADDON_API_DISABLE_DEPRECATED` can be defined at
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compile time before including `napi.h` to skip the definition of deprecated APIs.
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