Nevermind, found my own answer after finally hitting the right google
search terms.
Added
#ifdef __cplusplus
extern "C" {
#endif
... source code here...
#ifdef __cplusplus
}
#endif
So that the CPP compiler would know I was talking C and not CPP :)
On Mon, Oct 20, 2014 at 3:16 PM, Jeremy Darling <[email protected]>
wrote:
> Ok, stuck again. Got everything working with the integer and pointer
> thing from all the help before (thanks!) but now I'm stuck in another
> place. The source files I have are .C files with .H headers. I can
> compile them using node-gyp with no issues and apparently bind them to my
> .CC file with no issue.
>
> When I try and actually USE them though I get back an error saying
> undefined symbol: <somevalue> where <somevalue> is always _Z11<methodName>v
> the _Z11 and v never changes. The <methodName> part is always the name of
> the method from the .C file.
>
> I'm guessing this is something really simple, but I don't know enough
> about C/CC/whatever to know where I'm screwing up.
>
> Here is a simple example, while this isn't the real code it blows up just
> like the real code :)
>
> /* lib.c */
> #include lib.h
> int test_linked(void){
> return 1;
> }
>
> /* lib.h */
> #ifndef _LIB_
> #define _LIB_
> int rest_linked(void);
> #endif
>
> /*lib.cc*/
> #include <node.h>
> #include <v8.h>
>
> #include "lib.h"
>
> using namespace v8;
>
> Handle<Value> Test(const Arguments& args){
> HandleScope scope;
> return scope.Close(Number::New(test_linked()));
> }
>
> void init(Handle<Object> exports) {
> exports->Set(String::NewSymbol("test"),
> FunctionTemplate::New(Test)->GetFunction());
> }
>
> NODE_MODULE(lib, init)
>
> /* binding.gyp */
>
> {
> "targets": [
> {
> "target_name": "lib",
> "sources": [
> "src/lib.c",
> "src/lib.cc"
> ]
> }
> ]
> }
>
> Building with node-gyp rebuild results in all proper .O files put where
> you would expect (build/Release/obj.target/lib/src) and the .NODE file
> going where it should (build/Release)
>
> Then using:
> var lib = require('./build/Release/lib');
> lib.test();
>
> Fails with:
> node: symbol lookup error: /home/.../build/Release/lib.node: undefined
> symbol: _Z11test_linkedv
>
>
> I know this is something I'd doing wrong, but not sure what. I'm guessing
> there is some reference to the .O files missing or they are where they
> shouldn't be so when the .NODE file loads it can't find the .O files and
> thus can't link the methods.
>
> As always, any help greatly appreciated.
>
> - Jeremy
>
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