RE: [sigc] compile error

[Murray Cumming Comneon com]

Well, yes, that constructor is not defined. Neither is run(). I'm not sure
that it's supposed to actually compile. It should be easy to fix.

Murray Cumming
murrayc usa net
www.murrayc.com 

> -----Original Message-----
> From: Mattheos Kakaris [mailto:m kakaris chello nl] 
> Sent: Mittwoch, 9. Juli 2003 16:44
> To: libsigc-list gnome org
> Subject: [sigc] compile error
> 
> 
> While reading chapter 2. Connecting your code to signals from the
> libsigc++ documentation:
> http://libsigc.sourceforge.net/libsigc1_2/manual/html/ch02.htm
> l#id2773405
> 
> I tried to compile the simple example by using the instructions at the
> bottom of the page:
> 
> g++ example1.cc -o eg1 `pkg-config --cflags --libs sigc++-1.2`
> 
> 
> I get the following error message:
> 
> /tmp/ccXfsmCT.o(.text+0x47): In function `main':
> : undefined reference to `AlienDetector::AlienDetector[in-charge]()'
> /tmp/ccXfsmCT.o(.text+0xbb): In function `main':
> : undefined reference to `AlienDetector::run()'
> collect2: ld returned 1 exit status
> 
> 
> for reference purposes here is my complete code:
>  
> #include <iostream>
> #include <sigc++/sigc++.h>
> 
> #ifdef SIGC_CXX_NAMESPACES
> using namespace std;
> using namespace SigC;
> #endif
> 
> 
> class AlienDetector
> {
> public:
>     AlienDetector();
> 
>     void run();
> 
>     SigC::Signal0<void> detected;
> };
> 
> void warn_people()
> {
>     cout << "There are aliens in the carpark!" << endl;
> }
> 
> int main()
> {
>    AlienDetector mydetector;
>    mydetector.detected.connect( SigC::slot(warn_people) );
> 
>    mydetector.run();
> 
>     return 0;
> }
> 
> Please can someone tell me what I need to do to properly compile the
> code.
> 
> kind regards
> Mattheos
> 
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