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Re: New GCC 7 -Wformat-truncation suppressed by (and only by) -Og?

From: Stephan Bergmann <sbergman at redhat dot com>
To: gcc at gcc dot gnu dot org
Cc: Martin Sebor <msebor at gmail dot com>
Date: Thu, 23 Feb 2017 17:15:43 +0100
Subject: Re: New GCC 7 -Wformat-truncation suppressed by (and only by) -Og?
Authentication-results: sourceware.org; auth=none
References: <13e9c8d6-1154-fb6e-caf2-f4a11bc2276b@redhat.com> <0229e567-3137-9b74-53ef-d6e898474032@gmail.com>

On 02/23/2017 05:02 PM, Martin Sebor wrote:

On 02/23/2017 06:51 AM, Stephan Bergmann wrote:

At least with a recent GCC 7 trunk build ("gcc (GCC) 7.0.1 20170221
(experimental)"), I noticed that -Wformat-truncation warnings happen to
not be emitted if and only if -Og is given:


That's unfortunately a bug.  The warning runs at different stages
depending on whether or not optimization is enabled and it looks
like the global GCC variable it uses to determine this is not set
for -Og.  Can you please open a bug in Bugzilla?

<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79691>"-Wformat-truncation suppressed by (and only by) -Og"

References:
- New GCC 7 -Wformat-truncation suppressed by (and only by) -Og?
  - From: Stephan Bergmann
- Re: New GCC 7 -Wformat-truncation suppressed by (and only by) -Og?
  - From: Martin Sebor

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