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From: Florian Weimer <fweimer@redhat.com>
To: Walter Harms via Libc-alpha <libc-alpha@sourceware.org>
Cc: Walter Harms <wharms@bfs.de>
Subject: Re: questions to register_printf_specifier()
In-Reply-To: <6569e6623ba8441fac499f90ebc6d505@bfs.de> (Walter Harms via
 Libc-alpha's message of "Sun, 7 Mar 2021 11:18:03 +0000")
References: <6569e6623ba8441fac499f90ebc6d505@bfs.de>
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* Walter Harms via Libc-alpha:

> What is the use of *size ? it seems i can set it to any value without
> any effect.

It is the size of the storage needed by the user-defined va_arg
function, registered with register_printf_type.  See
stdio-common/tst-vfprintf-user-type.c for an example.

Thanks,
Florian