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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