GNU bug report logs - #54785
for floating point, printf should use double like in C instead of long double

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Glenn Golden <gdg <at> zplane.com>, 54785 <at> debbugs.gnu.org
Subject: bug#54785: for floating point, printf should use double like in C instead of long double
Date: Mon, 25 Apr 2022 18:33:29 -0700

On 4/25/22 16:50, Glenn Golden wrote:
> 
> 
> On Mon, Apr 25, 2022, at 13:06, Paul Eggert wrote:
>>
>> I'd like coreutils printf to stay compatible with Bash printf. Thanks.
>>
> 
> Is there any interest/motivation for consistentizing {coreutils printf, bash printf} with glibc printf? There's a minor but notable inconsistency between them for %a format. See
> 
>      https://lists.gnu.org/archive/html/coreutils/2022-04/msg00020.html
> 
> I asked about this on the coreutils list, but no response.

To some extent it's the same problem. If Bash and coreutils printf 
change to use 'double', they'll output the same thing that C printf outputs.

But to some extent it's a different problem, as the Bash and coreutils 
printf use glibc printf with long double, and the latter isn't working 
consistently with double. I suppose filing a glibc bug report might 
address this different problem.

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