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From: "groessler_christian at yahoo dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/66425] (void) cast doesn't suppress
 __attribute__((warn_unused_result))
Date: Wed, 14 Feb 2024 11:32:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D66425

Christian Groessler <groessler_christian at yahoo dot de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |groessler_christian at yah=
oo dot d
                   |                            |e

--- Comment #62 from Christian Groessler <groessler_christian at yahoo dot =
de> ---
(In reply to Segher Boessenkool from comment #60)
> So you want to not warn for some (just *some*) explicitly unused cases, a=
nd
> do
> warn for other explicitly unused cases, and all implicitly unused cases?=
=20
> While
> the author of the code explicitly asked for a warning message to be emitt=
ed
> in
> all such cases: "The 'warn_unused_result' attribute causes a warning to be
> emitted if a caller of the function with this attribute does not use its
> return
> value."

Yes! I'm write()ing to a pipe a small amount of data (< page size), and any=
way
don't know how to continue if the write() fails. It would be noticed at the
other end.

(void)write(....)  doesn't suppress the warning. Annoying...=