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+# node-gyp
+
+C++ code needs to be compiled into executable form whether it be as an object
+file to linked with others, a shared library, or a standalone executable.
+
+The main reason for this is that we need to link to the Node.js dependencies and
+headers correctly, another reason is that we need a cross platform way to build
+C++ source into binary for the target platform.
+
+Until now **node-gyp** is the **de-facto** standard build tool for writing
+Node.js addons. It's based on Google's **gyp** build tool, which abstract away
+many of the tedious issues related to cross platform building.
+
+**node-gyp** uses a file called ```binding.gyp``` that is located on the root of
+your addon project.
+
+```binding.gyp``` file, contains all building configurations organized with a
+JSON like syntax. The most important parameter is the  **target** that must be
+set to the same value used on the initialization code of the addon as in the
+examples reported below:
+
+### **binding.gyp**
+
+```gyp
+{
+  "targets": [
+    {
+      # myModule is the name of your native addon
+      "target_name": "myModule",
+      "sources": ["src/my_module.cc", ...],
+      ...
+  ]
+}
+```
+
+### **my_module.cc**
+
+```cpp
+#include <napi.h>
+
+// ...
+
+/**
+* This code is our entry-point. We receive two arguments here, the first is the
+* environment that represent an independent instance of the JavaScript runtime,
+* the second is exports, the same as module.exports in a .js file.
+* You can either add properties to the exports object passed in or create your
+* own exports object. In either case you must return the object to be used as
+* the exports for the module when you return from the Init function.
+*/
+Napi::Object Init(Napi::Env env, Napi::Object exports) {
+
+  // ...
+
+  return exports;
+}
+
+/**
+* This code defines the entry-point for the Node addon, it tells Node where to go
+* once the library has been loaded into active memory. The first argument must
+* match the "target" in our *binding.gyp*. Using NODE_GYP_MODULE_NAME ensures
+* that the argument will be correct, as long as the module is built with
+* node-gyp (which is the usual way of building modules). The second argument
+* points to the function to invoke. The function must not be namespaced.
+*/
+NODE_API_MODULE(NODE_GYP_MODULE_NAME, Init)
+```
+
+## **node-gyp** reference
+
+  - [Installation](https://www.npmjs.com/package/node-gyp#installation)
+  - [How to use](https://www.npmjs.com/package/node-gyp#how-to-use)
+  - [The binding.gyp file](https://www.npmjs.com/package/node-gyp#the-bindinggyp-file)
+  - [Commands](https://www.npmjs.com/package/node-gyp#commands)
+  - [Command options](https://www.npmjs.com/package/node-gyp#command-options)
+  - [Configuration](https://www.npmjs.com/package/node-gyp#configuration)
+
+Sometimes finding the right settings for ```binding.gyp``` is not easy so to
+accomplish at most complicated task please refer to:
+
+- [GYP documentation](https://gyp.gsrc.io/index.md)
+- [node-gyp wiki](https://github.com/nodejs/node-gyp/wiki)