I have a series of c++ classes stored in a library with a C interface (see example below). And I have a C program that includes this c++ libary via the C interface. This seems to work well until I tried to create a class in the libary with new and delete.

I am using gcc to compile the C code and g++ for the C++ libary, I crated the projects with Eclipse on unbunu.

The error message that I get is

undefined reference to 'operator new(unsigned int)' 
undefined reference to 'operator delete(void*)' 

Libary H file

#ifndef CFOO_H_
#define CFOO_H_
#ifdef __cplusplus

class CBar {
   public:
      int i ; 
};

class CFoo {
   public:
      int work();
};
extern CFoo g_foo ;
extern "C" {
#endif /* __cplusplus */    
   int foo_bar( ) ;    
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* CFOO_H_ */

Libary cpp file

#include "CFoo.h"
CFoo g_foo ;

int CFoo::work() {
   CBar * b = new CBar(); 
   delete b; 
   return 1; 
}

int foo_bar( ) {
   return g_foo.work( );
}

Main c file

void * __gxx_personality_v0 ;
int main(void) {
printf( "foo_bar 10   =%d\n", foo_bar() ) ;
     return 0; 
}

I have tried a few things with out success, any thoughts?

Edit

It looks like it was a problem with the auto generated make files produced by Eclipse. Once I manualy changed the C applcations makefile to link with g++ instead of gcc I was able to build the applcation. See comments below for mo开发者_开发技巧re information.

Quoting unapersson: It's not linking in the C++ runtime. You should use "g++" as the link command, rather than "gcc".