mingw-w64-crt/misc/mb_wc_common.h

/**
 * This file has no copyright assigned and is placed in the Public Domain.
 * This file is part of the mingw-w64 runtime package.
 * No warranty is given; refer to the file DISCLAIMER.PD within this package.
 */

#include <_mingw.h>

extern unsigned int (__cdecl *__mingw_get_codepage)(void);