Undefined reference to C++

Question

I have a class Settings declared like this (in Settings.h file) - just part of it:

class Settings {

public:
  Settings(const edm::ParameterSet& iConfig);
  ~Settings(){}

}

Then I want to use it in another class called TMTrackAnalyzer. In TMTrackAnalyzer.h I have this:

#include Settings.h

class TMTrackAnalyzer : public edm::EDProducer {

 public:
  explicit TMTrackAnalyzer(const edm::ParameterSet&);
  ~TMTrackAnalyzer(){}

 private:
 Settings *settings_;
}

and in TMTrackAnalyzer I have this:

TMTrackAnalyzer::TMTrackAnalyzer(const edm::ParameterSet& iConfig)
{
    settings_ = new Settings(iConfig);
}

When I run the code I get this error:

undefined reference to `Settings::Settings(edm::ParameterSet const&)'
collect2: error: ld returned 1 exit status

As far as I understand this error appears mainly when you don't call the function properly (with the same parameters that you define it with), but I can't find the reason why I get this error. Can someone help me? Thank you!

You do have the `Settings` constructor *defined* (implemented) in a source file you build (link) with? — Some programmer dude, Jul 26 '17 at 12:24
You need to define and link to`Settings(const edm::ParameterSet& iConfig)`. — NathanOliver, Jul 26 '17 at 12:24
@NathanOliver but I think I do this (I am not sure tho). I call multiple classes, not just Settings, and all the other work fine. — Silviu, Jul 26 '17 at 12:26
@Bobo Where do you have `Settings(const edm::ParameterSet& iConfig) { some code here }`? — NathanOliver, Jul 26 '17 at 12:27
They are not in the same folder as TMTrackAnalyzer. But actually when I include them I use: #include — Silviu, Jul 26 '17 at 12:31
Settings.h you shown us does not include a definition of the **constructor**, only one for the destructor. — , Jul 26 '17 at 13:10
@manni66 The constructor is defined in Settings.cc which I didn't put here. — Silviu, Jul 26 '17 at 13:12
Then you don't compile/link Settings.cc or there is a bug in it. — , Jul 26 '17 at 13:14

Undefined reference to C++

0 Answers0