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Old 12-21-2009, 08:18 AM   #1
skiman1979
LQ Newbie
 
Registered: Dec 2009
Location: Earth
Distribution: My distro changes somewhat often. I've used Gentoo, Ubuntu, Mandrake, Red Hat, and others.
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libsigc++ on Ubuntu - won't compile


Hi all,

Does anyone have any experience with libsigc++ (1.2 or 2.0) on Linux?

I'm currently working on a C++ console application (using Eclipse) that has a few classes and I wanted to enable certain classes to raise events back to event handlers in main.cpp. I came across libsigc++-2.0 but am having problems actually using it.

It installs just fine on my Ubuntu 9.04 box (both the runtime and dev packages) but I'm not sure what to actually #include in my source code. I tried following the tutorial on the libsigc++ site (Chapter 2. Connecting your code to signals) but it doesn't give any information on what libsigc++ headers I need.

I think I narrowed it down to #include <sigc++-2.0/sigc++/signals.h>, but I am getting hundreds of compiler errors similar to " '_A_a1_' was not declared in this scope" referencing signal.h.

Following is some code for my class header. I haven't put anything into the implementation file yet, or main.cpp.

Code:
#include <pthread>
#include <stdlib>
#include <iostream>
#include <fstream>
using namespace std;

#include <sigc++-2.0/sigc++/signal.h>

class MyClass
{
public:
        MyClass();
        virtual ~MyClass();

        sigc::signal<void,int> MySignal1;
        sigc::signal<void,int> MySignal2;

        void WaitForSomething();  //reads certain files and triggers events
};
My intent was in WaitForSomething() to execute MySignal1.emit() (or MySignal2.emit()), which would be connected to OnMySignalX functions in main.cpp, but that part hasn't been written yet.

On a side note: For some reason, if I remove 'int' from the MySignal1 or MySignal2 declaration (e.g., sigc::signal<void> MySignal1;, the compiler tells me I have an invalid entry for argument 2. I thought signal was supposed to be a wrapper so only the first argument (the template's return type) is required.

Last edited by XavierP; 01-21-2010 at 02:49 PM. Reason: Moved to Programming
 
  


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