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Sat, 18 Oct 2025 12:50:43 -0700 (PDT)
Message-ID: <c2bd52c1-447a-413e-9166-c25e6bc2f5d3@gmail.com>
Date: Sat, 18 Oct 2025 21:50:41 +0200
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To: The Cygwin Mailing List <cygwin AT cygwin DOT com>
Subject: the usage of "mkstemp" requires std=c... or std=gnu.. ?
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From: Marco Atzeri via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

Hi,

from
https://pubs.opengroup.org/onlinepubs/9799919799/functions/mkdtemp.html

-----------------------------------------
Issue 7

     Austin Group Interpretation 1003.1-2001 #143 is applied.
     SD5-XSH-ERN-168 is applied, clarifying file permissions upon creation.
     The mkstemp() function is moved from the XSI option to the Base.
------------------------------------------

I would expect --std=c++-20 should be enough, but
currently --std=gnu++-20 is required to build latest
version of libheif

Regards
Marco





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