Visual Studio 2015 Legacy Link Error Fix : __imp__iob_fuc

vs2015_iob_func_fix.cpp

////////////////////////////////////////////////////////////////////////////
//// stdin, stdout, stderr link error for vs2015
//// override implementation of __iob_func
//// https://stackoverflow.com/questions/30412951/unresolved-external-symbol-imp-fprintf-and-imp-iob-func-sdl2
#if ( _msc_ver >= 1900 )
#include <cstdio>
extern "c" file * __cdecl __iob_func(void)
{
    struct _iobuf_vs2012 { // ...\microsoft visual studio 11.0\vc\include\stdio.h #56
        char *_ptr;
        int   _cnt;
        char *_base;
        int   _flag;
        int   _file;
        int   _charbuf;
        int   _bufsiz;
        char *_tmpfname;
    };
    // vs2015 has file = struct {void* _placeholder}

    static struct _iobuf_vs2012 bufs[3];
    static char initialized = 0;

    if (!initialized) {
        bufs[0]._ptr = reinterpret_cast<char*>(stdin->_placeholder);
        bufs[1]._ptr = reinterpret_cast<char*>(stdout->_placeholder);
        bufs[2]._ptr = reinterpret_cast<char*>(stderr->_placeholder);
        initialized = 1;
    }

    return (file*)&bufs;
}
#endif