已定义链接器错误 [英] Linker Errors Already defined

问题描述

我正在制作一个nodejs插件.我的Visual Studio项目中有5个文件:

I am making a nodejs addon. I have 5 files in my visual studio project :

comm.h/cc, node_main.cc, util.h/cc

我将其链接到库node.lib

node_main.cc具有一个功能:

node_main.cc has a function :

v8::Handle<v8::Value> StartMethod(const v8::Arguments &args) {
    v8::HandleScope scope(args.GetIsolate()); // node_isolate
    int length = args.Length();
    std::vector<std::unique_ptr<char[]>> argv;
    for(int i=0;i<length;++i) {
        if(args[i]->IsString()) {
            v8::String::Utf8Value str(args[i]);
            const int strLen = ToCStringLen(str);
            if(strLen) {
                std::unique_ptr<char []> data(new char[strLen+1]);
                strcpy_s(data.get(), strLen+1, ToCString(str));
                argv.push_back(std::move(data));
            }
        }
    }
    return scope.Close(v8::Int32::New(MainMethod(argv.size(), &(argv[0]._Myptr))));
}

构建解决方案时，出现以下链接器错误:

When i build the solution i get following linker errors:

1>node.lib(node.exe) : error LNK2005: "public: bool __thiscall v8::Value::IsString(void)const " (?IsString@Value@v8@@QBE_NXZ) already defined in communicator.obj
1>node.lib(node.exe) : error LNK2005: "public: class v8::Local<class v8::Value> __thiscall v8::Arguments::operator[](int)const " (??AArguments@v8@@QBE?AV?$Local@VValue@v8@@@1@H@Z) already defined in communicator.obj
1>node.lib(node.exe) : error LNK2005: "public: int __thiscall v8::Arguments::Length(void)const " (?Length@Arguments@v8@@QBEHXZ) already defined in communicator.obj
1>node.lib(node.exe) : error LNK2005: "public: class v8::Isolate * __thiscall v8::Arguments::GetIsolate(void)const " (?GetIsolate@Arguments@v8@@QBEPAVIsolate@2@XZ) already defined in communicator.obj

功能IsString(), Arguments::[] and GetIsolate()仅在hello.cc中使用，而Arguments::Length()在communicator.cc中使用.即便如此，所有错误均参考communicator.cc.

The function IsString(), Arguments::[] and GetIsolate() is used only in hello.cc and Arguments::Length() are used in communicator.cc. Even then all errors refer to communicator.cc.

我只调用cc文件中的函数，没有给出任何新定义.

I am only calling the functions in cc files not giving any new definition.

出什么问题了?

提前谢谢.

推荐答案

我遇到了同样的问题，我找到了解决方法

I had the same problem, I found a solution here. Put an #include <node.h> before every #include <v8.h>.

这篇关于已定义链接器错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！