[gcc] Static class field in shared object links to two addresses

[Adek336]

/* A.h */
#ifndef A_H
#define A_H

#include <iostream>

class A
{
public:
    A()
    {
        static int i = 0;
        std::cerr << (void*)&i << std::endl;
    }
};

#endif

/* x.cc */
#include "A.h"

A x;

int main()
{
}

/* y.cc */
#include "A.h"

A y;

g++ y.cc -shared -o y.so
g++ x.cc y.so
LIBRARY_PATH=. ./a.out

results in

0x203ac0
0x201d1c

whereas the addresses should be equal.

hrev37527, gcc4+2 hybrid, VBox 3.1

[bonefish]

This problem already existed under BeOS R5 with gcc 2.9. I don't know whether there are any provisions in gcc 4 that allow to make this work without weak symbol support by the OS. I guess we really should implement it, anyway.

[diver]

As weak symbol support was implemented is this still an issue?

[bonefish]

I don't recall whether I have tested the given code example, but at least with gcc 4 it should now work as expected. With gcc 2 it probably still doesn't, but that's due to the symbolic linking which we probably won't change.