[Bug ld/30254] iostream crashes with ld linker for windows targets

[euloanty at live dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30254

--- Comment #14 from cqwrteur <euloanty at live dot com> ---
Some one tries this program:
#include <Windows.h>
#include <cstdio>
#include <cstdlib>
#include <iostream>

typedef void* (__cdecl* fn_type_t)(void* self, char const* string);

int main()
{
        MessageBoxA(nullptr,"pause",nullptr,0);
        auto hModule = GetModuleHandleA("libstdc++-6.dll");
        auto cout = reinterpret_cast<void*>(GetProcAddress(hModule,
"_ZSt4cout"));
        auto fn = reinterpret_cast<fn_type_t>(GetProcAddress(hModule,
"_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc"));
        fn(cout, "Hello World!\n");
        std::cout << "Hello World!\n";
        return 0;
}

He found std::cout binds to the wrong address for ld.

Here is a variable inside the PE file.
void * address = &std::cout;

Now, we want to make this = address, but GNU LD gives you this = &address.

This pointer is incorrect,
so it will definitely result in an error.

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