nodejs addon c++ 连接其他库文件 node-gyp

1. 使用静态库

1, test.js

var addon = require('./hello');

var mpsse = addon.hello();

console.log(mpsse.x); 

2, hello.cpp

#include <node.h>
#include <v8.h>

#include "NFCInfo.h" //外部静态库的头文件

using namespace v8;

//静态类用作全局变量，可以返回js对象。
class JSNFC{
public:
	static void init(Handle<Object> target){
		nfcObj = Object::New();
		nfcObj->Set(String::NewSymbol("x"), Integer::New(10) );
	}
	
	static Handle<Object> nfcObj;
};

Handle<Object> JSNFC::nfcObj;

Handle<Value> Method(const Arguments& args) {
  HandleScope scope;

　　//测试的外部静态类方法
　　NFCInfo nfc("NFC");
　　nfc.writeSmartposter("zhibin","232323");

  　return scope.Close( JSNFC::nfcObj  );
}

void init(Handle<Object> target) {
		target->Set(String::NewSymbol("hello"),
      			FunctionTemplate::New(Method)->GetFunction());


　　JSNFC::init(target);
}
NODE_MODULE(hello, init)

　　

3，binding.gyp

{
  "targets": [
    {
      "target_name": "hello",
      "sources": [ "hello.cpp" ],
	'include_dirs': [
                       './include'
	]
    }
  ]
}

　　

include_dirs是外部库的头文件

4，mybuild.sh

node-gyp configure build
gcc -fexceptions -O2 -o hello.node ./build/Release/obj.target/hello/hello.o ./libmynfclib.a /usr/local/lib/libnfc.a  -shared -fPIC

　在当前目录生成了 hello.node 可执行动态库。

执行node-gyp test.js.

---

或者只要在binding.gyp加入一句话：

{
  "targets": [
    {
      "target_name": "hello",
      "sources": [ "hello.cpp" ],
	'include_dirs': [
                       './include'
	],
	"libraries":["/home/user/workspace/nodejs/libpanda.a", "/usr/local/lib/libnfc.a"]
    }
  ]
}

　　

---

2.使用动态库，避免两个静态库有redefine。

1）binding.gyp

{
  "targets": [
    {
      "target_name": "hello",
      "sources": [ "hello.cpp" ],
	'include_dirs': [
                       './include'
	],
	"libraries":["/home/user/workspace/nodejs/libpanda.a", "/usr/local/lib/libnfc.so","/usr/local/lib/libmpsse.so"],
	"cflags!":["-fexceptions"]
    }
  ]
}

2) hello.cpp

#include <node.h>
#include <v8.h>

#include "NFCInfo.h"
#include "AccelerMeter.h"

#define WIRING_DEFINE_CONSTANT(NAME, VALUE) (target)->Set( 
        v8::String::NewSymbol(NAME), 
        v8::Integer::New(VALUE), 
        static_cast<v8::PropertyAttribute>(v8::None) 
);

using namespace v8;

class JSNFC {
public:
    static void init(Handle<Object> target) {
        //Here can store target object.
    }
    
    static Handle<Object> readADXL() {
        
        AccelerMeter am("AccelerMeter");
        am.readADXL();
        Handle<Object> mpsseObj = Object::New();
        mpsseObj->Set(String::NewSymbol("x"), Integer::New(am.x));
        mpsseObj->Set(String::NewSymbol("y"), Integer::New(am.y));
        mpsseObj->Set(String::NewSymbol("z"), Integer::New(am.z));
        
        return mpsseObj;
    }    

};

Handle<Value> sendSmartposter(const Arguments& args) {
    HandleScope scope;
    
    NFCInfo nfc("NFC");    
    nfc.writeSmartposter("zhibin", "232323");
    bool ret = nfc.send();
    return scope.Close(Integer::New((ret?1:0)));
}

Handle<Value> readADXL(const Arguments& args) {
    HandleScope scope;    
    ;
    return scope.Close(JSNFC::readADXL());
}

void init(Handle<Object> target) {
    target->Set(String::NewSymbol("smartposter"), FunctionTemplate::New(sendSmartposter)->GetFunction());    
    target->Set(String::NewSymbol("readADXL"), FunctionTemplate::New(readADXL)->GetFunction());
    
    JSNFC::init(target);
}
NODE_MODULE(hello, init)

3) test.js

//var addon = require('./hello');
var addon = require('./build/Release/hello');



var mpsse = addon.readADXL();

console.log(mpsse.x); 
console.log(mpsse.y); 
console.log(mpsse.z); 

console.log(addon.smartposter());

4) 编译运行：

 node-gyp build

node test.js