Re: [PATCH v3 01/11] ldbl-128ibm-compat: Fix selection of GNU and ISO C99 scanf

[Paul E Murphy <murphyp at linux dot ibm dot com>]

On 12/3/19 11:05 AM, Gabriel F. T. Gomes wrote:
> From: "Gabriel F. T. Gomes" <gabrielftg@linux.ibm.com>
>
> New since v2.
>
> -- 8< --
> Since commit
>
> commit 03992356e6fedc5a5e9d32df96c1a2c79ea28a8f
> Author: Zack Weinberg <zackw@panix.com>
> Date:   Sat Feb 10 11:58:35 2018 -0500
>
>      Use C99-compliant scanf under _GNU_SOURCE with modern compilers.
>
> the selection of the GNU versions of scanf functions requires both
> _GNU_SOURCE and -std=c89.  This patch changes the tests in
> ldbl-128ibm-compat so that they actually test the GNU versions (without
> this change, the redirection to the ISO C99 version always happens, so
> GNU versions of the new implementation (e.g. __scanfieee128) were left
> untested).

Good catch Zach, thanks.  I wasn't aware of this behavior and verified 
it too.  LGTM.