[PATCH 1/1] libstdc++: Deal with ENOSYS == ENOTSUP

[Ville Voutilainen]

On Fri, 6 Mar 2020 at 10:41, Andreas Krebbel <krebbel@linux.ibm.com> wrote:
>
> zTPF uses the same numeric value for ENOSYS and ENOTSUP.
>
> Ok for mainline?
>
> libstdc++-v3/ChangeLog:
>
> 2020-03-06  Andreas Krebbel  <krebbel@linux.ibm.com>
>
>         * src/c++11/system_error.cc: Omit the ENOTSUP case statement if it
>         would match ENOSYS.
> ---
>  libstdc++-v3/src/c++11/system_error.cc | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/libstdc++-v3/src/c++11/system_error.cc b/libstdc++-v3/src/c++11/system_error.cc
> index 7844afe6d2a..1f06e67feea 100644
> --- a/libstdc++-v3/src/c++11/system_error.cc
> +++ b/libstdc++-v3/src/c++11/system_error.cc
> @@ -251,7 +251,8 @@ namespace
>  #ifdef ENOTSOCK
>        case ENOTSOCK:
>  #endif
> -#ifdef ENOTSUP
> +#if defined ENOTSUP && (!defined ENOSYS || ENOTSUP != ENOSYS)

Hmm, what system does not have ENOSYS but has ENOTSUP? Meaning the
!defined ENOSYS
bit?