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

 1 #include <node.h>
 2 #include <v8.h>
 3 
 4 #include "NFCInfo.h"
 5 #include "AccelerMeter.h"
 6 
 7 #define WIRING_DEFINE_CONSTANT(NAME, VALUE) (target)->Set( \
 8         v8::String::NewSymbol(NAME), \
 9         v8::Integer::New(VALUE), \
10         static_cast<v8::PropertyAttribute>(v8::None) \
11 );
12 
13 using namespace v8;
14 
15 class JSNFC {
16 public:
17     static void init(Handle<Object> target) {
18         //Here can store target object.
19     }
20     
21     static Handle<Object> readADXL() {
22         
23         AccelerMeter am("AccelerMeter");
24         am.readADXL();
25         Handle<Object> mpsseObj = Object::New();
26         mpsseObj->Set(String::NewSymbol("x"), Integer::New(am.x));
27         mpsseObj->Set(String::NewSymbol("y"), Integer::New(am.y));
28         mpsseObj->Set(String::NewSymbol("z"), Integer::New(am.z));
29         
30         return mpsseObj;
31     }    
32 
33 };
34 
35 Handle<Value> sendSmartposter(const Arguments& args) {
36     HandleScope scope;
37     
38     NFCInfo nfc("NFC");    
39     nfc.writeSmartposter("zhibin", "232323");
40     bool ret = nfc.send();
41     return scope.Close(Integer::New((ret?1:0)));
42 }
43 
44 Handle<Value> readADXL(const Arguments& args) {
45     HandleScope scope;    
46     ;
47     return scope.Close(JSNFC::readADXL());
48 }
49 
50 void init(Handle<Object> target) {
51     target->Set(String::NewSymbol("smartposter"), FunctionTemplate::New(sendSmartposter)->GetFunction());    
52     target->Set(String::NewSymbol("readADXL"), FunctionTemplate::New(readADXL)->GetFunction());
53     
54     JSNFC::init(target);
55 }
56 NODE_MODULE(hello, init)

3) test.js

 1 //var addon = require('./hello');
 2 var addon = require('./build/Release/hello');
 3 
 4 
 5 
 6 var mpsse = addon.readADXL();
 7 
 8 console.log(mpsse.x); 
 9 console.log(mpsse.y); 
10 console.log(mpsse.z); 
11 
12 console.log(addon.smartposter());

4) 编译运行：

node-gyp build

node test.js