You need to include <node.h> in all your .cpp files before requiring
anything else.
node.h picks up that BUILDING_NODE_EXTENSION is defined and sets up other
libraries (like v8 and libuv) to link dynamically.
- Bert
On Wednesday, July 3, 2013 3:28:08 PM UTC+2, Alex Netkachov wrote:
>
> I'm working on the node.js module in Visual Studio and have the following
> file structure:
>
> load.h
>
> #include <string>
> #include <v8.h>
>
> void property_guard(v8::Local<v8::Object> obj, v8::Local<v8::String>
> name, const std::string path);
>
> load.cpp
>
> #include "load.h"
>
> void property_guard(v8::Local<v8::Object> obj, v8::Local<v8::String>
> name, const std::string path) {
> if (!obj->Has(name)) {
> throw path + " does not exist";
> }
> }
>
> main.cpp
>
> #include <string>
> #include <node.h>
> #include <v8.h>
> #include "load.h"
>
> void integer_type_guard(v8::Local<v8::Value> obj, const std::string
> path) {
> if (!obj->IsInt32()) {
> throw path + " is not an integer";
> }
> }
>
> int get_int_property(v8::Local<v8::Object> obj, v8::Local<v8::String>
> name, const std::string path) {
> property_guard(obj, name, path);
> v8::Local<v8::Value> value = obj->Get(name);
> integer_type_guard(value, path);
> return value->Int32Value();
> }
>
>
> I expect that the structure is correct, but I get an error in Visual
> Studio and similar when I compile the project with node-gyp:
>
> error LNK2005: "public: class v8::Object * __cdecl v8::Handle<class
> v8::Object>::operator->(void)const "
> (??C?$Handle@VObject@v8@@@v8@@QEBAPEAVObject@1@XZ) already defined in
> node.lib(node.exe) C:\...\load.obj
> error LNK1169: one or more multiply defined symbols found
> C:\...\Test1.dll
>
> Removing the node.h from the main.cpp includes removes the error (I need
> it to register the module). Moving the property_guard method to main.cpp
> also solves the issue.
>
> What is the correct way of moving declaration to other file in this case?
>
> My environment:
>
> * Visual Studio 2012
> * node.js 0.10.12 x64
>
> Thank you,
> Alex
>
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