Re: [PATCH] gcc/testsuite/g++/bad-mapper-3.C: localhost might not be known

[Andrew Pinski]

On Thu, Dec 4, 2025 at 7:05 AM Ross Burton <ross.bur...@arm.com> wrote:
>
> The module-mapper uses Cody::OpenInet6 to open the connection to the
> host. However, some distributions (such as Ubuntu 24.04) only have a v4
> address for localhost:
>
>   $ grep localhost /etc/hosts
>   127.0.0.1  localhost
>   ::1        ip6-localhost ip6-loopback
>
> On these systems this test fails with "Name or service not known", so
> add that to the list of allowed error messages.

Thinking about this, I almost want to say OpenInet6 should fall back
to IPv4 if IPv6 fails.
But given right now the mapper is not used by anyone, I think the
patch is ok with a changelog entry added.

Thanks,
Andrew Pinski

> ---
>  gcc/testsuite/g++.dg/modules/bad-mapper-3.C | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/gcc/testsuite/g++.dg/modules/bad-mapper-3.C 
> b/gcc/testsuite/g++.dg/modules/bad-mapper-3.C
> index 2a57956afc87..ca7eec2e1df5 100644
> --- a/gcc/testsuite/g++.dg/modules/bad-mapper-3.C
> +++ b/gcc/testsuite/g++.dg/modules/bad-mapper-3.C
> @@ -1,6 +1,6 @@
>  //  { dg-additional-options "-fmodules-ts 
> -fmodule-mapper=localhost:172477262" }
>  import unique3.bob;
> -// { dg-error {failed (socket|connecting|disabled) mapper 
> 'localhost:172477262'} "" { target *-*-* } 0 }
> +// { dg-error {failed (socket|connecting|disabled|Name or service not known) 
> mapper 'localhost:172477262'} "" { target *-*-* } 0 }
>  // { dg-prune-output "fatal error:" }
>  // { dg-prune-output "failed to read" }
>  // { dg-prune-output "compilation terminated" }
> --
> 2.43.0
>