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From: Jonathan Wakely <jwakely.gcc@gmail.com>
Date: Fri, 2 Oct 2020 14:09:02 +0100
Message-ID: <CAH6eHdSWkL6LOfvUn8M4wY+Y7UFADfCeE91g5SPAqkEr8w9GxA@mail.gmail.com>
Subject: Re: [PATCH v2 1/4] system_data_types.7: Add int_leastN_t family of
 types
To: Alejandro Colomar <colomar.6.4.3@gmail.com>
Cc: Paul Eggert <eggert@cs.ucla.edu>, 
 "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>,
 linux-man <linux-man@vger.kernel.org>, 
 GNU C Library <libc-alpha@sourceware.org>, "gcc@gcc.gnu.org" <gcc@gcc.gnu.org>
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On Fri, 2 Oct 2020 at 09:36, Alejandro Colomar via Gcc <gcc@gcc.gnu.org> wrote:
>
> Hi Paul,
>
> On 2020-10-01 19:38, Paul Eggert wrote:
>  > On 10/1/20 7:35 AM, Alejandro Colomar via Libc-alpha wrote:
>  >> +The narrowest signed integer type
>  >> +of a width of at least N bits,
>  >
>  > Motivation is missing here. Why is there an int_leastN_t type at all?
>
> Well, I'd say the motivation is for the standard to allow
> unicorn implementations that have types that are not of normal widths
> For example, this allows an implementation to have an int of 33 bits,
> have int_least32_t be that int, and then not provide int32_t.

C allows that, but POSIX says int32_t is required.