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Re: format-truncation warning with -O2 on gcc 7.1.1

From: Pico Geyer <picogeyer at gmail dot com>
To: Jonathan Wakely <jwakely dot gcc at gmail dot com>
Cc: gcc-help <gcc-help at gcc dot gnu dot org>
Date: Thu, 22 Jun 2017 17:05:21 +0200
Subject: Re: format-truncation warning with -O2 on gcc 7.1.1
Authentication-results: sourceware.org; auth=none
References: <CAPPm2VrK5b0f2N6+pQHQMjvARpH3PoT9xtFa-ry_30wZTpNJQQ@mail.gmail.com> <CAH6eHdRUirTU+UzjEaWtOu9ttorgsUUO0db_HuvxWb4DLXvPLg@mail.gmail.com> <CAH6eHdSoReL=_4AFpwHz0MbcxkM989ZqmGz91s29=Cw-ASJ2tg@mail.gmail.com>

On Thu, Jun 22, 2017 at 4:51 PM, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
> On 22 June 2017 at 15:31, Jonathan Wakely wrote:
>> Because the -Wformat-overflow warnings are new in GCC 7, i.e. GCC got
>> better. See https://gcc.gnu.org/gcc-7/changes.html#c-family
>
> Oops, I meant -Wformat-truncation not -Wformat-overflow. I copy&pasted
> the wrong option.

I didn't even notice :-|

I forgot to follow up on the comment in the code.
Any idea why commenting out the "  if ( amt == 0 ) return " makes the
warning go away?
I can't think of a reason.

Pico

Follow-Ups:
- Re: format-truncation warning with -O2 on gcc 7.1.1
  - From: Martin Sebor

References:
- format-truncation warning with -O2 on gcc 7.1.1
  - From: Pico Geyer
- Re: format-truncation warning with -O2 on gcc 7.1.1
  - From: Jonathan Wakely
- Re: format-truncation warning with -O2 on gcc 7.1.1
  - From: Jonathan Wakely

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