[sigc] newbie questions

Hi.  I'm not new to C++, but I am new to libsigc++.  I'm finding it difficult to navigate the documentation and examples.

I'm running Fedora Core 4 with these installed:


Googling "libsigc++" turns up:


The reference documentation doesn't seem to include examples, so I tried "tutorial-style".  Tho motivation section is quite motivating!

However, I hit snags at the Alien example.  It does give the command line for compiling, but the example code given up to that point does not compile: doesn't say what to #include, missing definitions for AlienDetector::run(), AlienDetector::AlienDetector().  I also don't see any links to downloadable, runnable examples.  At this point, I'm pretty much dead in the water.  Is getting started easier for other people?  Am I overlooking some obvious documentation or examples or tutorials?

So at this point, I gave up and decided to take a stab at what I had in mind, grabbing bits and pieces from various places on the web.   I have:

$cat hello.cc

#include <iostream>

#include <sigc++/sigc++.h>
#include <sigc++/slot.h>

using namespace std;

void hello() { cout<<"hello, "<<flush; }
void world() { cout<<"world!"<<endl; }

int main()
   SigC::Signal0<void> signal;



   cout<<"Good night, Moon."<<endl;


compiled with:

$ cat Makefile

default: hello

hello: hello.cc
        g++ hello.cc -o hello `pkg-config --cflags --libs sigc++-2.0`

        -rm -f *.o hello

giving this output:

$ make
g++ hello.cc -o hello `pkg-config --cflags --libs sigc++-2.0`
hello, world!
Good night, Moon.
make: *** [default] Segmentation fault


  1) Have I done something exceptionally goofy or not in the spirit of libsigc++?
  2) Why does the tutorial give the namespace "sigc", but I have to use "SigC"?
  3) Why does sigc++/sigc++.h #include sigc++/signal.h, but not sigc++/slot.h?
  4) Why the segfault?

Thanks in advance for any help.


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