[Bug libstdc++/71444] New: Error code on MinGW-w64

[frankhb1989 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71444

            Bug ID: 71444
           Summary: Error code on MinGW-w64
           Product: gcc
           Version: 5.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: frankhb1989 at gmail dot com
  Target Milestone: ---

Several enumerators are commented out in <bits/error_constants.h> for
MinGW-w64. 

However, I find several macros are actually usable in <errno.h> in the
distribution (MSYS2) I am using, as:


/* Defined as WSAETIMEDOUT.  */
#ifndef ETIMEDOUT
#define ETIMEDOUT 138
#endif

#ifndef ELOOP
#define ELOOP 114
#endif

#ifndef EPROTOTYPE
#define EPROTOTYPE 136
#endif

#ifndef EOVERFLOW
#define EOVERFLOW 132
#endif


Can they be configured automatically?