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	Wed, 23 Apr 2025 20:28:04 -0700 (PDT)
To:	cygwin AT cygwin DOT com
Subject:	tfind missing a const qualifier.
Date:	Wed, 23 Apr 2025 20:28:03 -0700
Message-ID:	<87tt6exmpo.fsf@gmail.com>
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From:	Collin Funk via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Collin Funk <collin DOT funk1 AT gmail DOT com>
Sender:	"Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

Hi,

While testing gnulib I noticed that tfind on cygwin is defined like:

    void *tfind (const void *, void **,
                 int (*) (const void *, const void *));

But POSIX requires [1] (*):

    void *tfind (const void *key, void *const *rootp,
                int (*compar) (const void *, const void *));

For programs written expecting the POSIX prototype, there will be many
warnings that 'rootp' has it's const qualifier discarded.

Collin

[1] https://pubs.opengroup.org/onlinepubs/9799919799/functions/tfind.html

(*) Ignoring the fact that POSIX.1-2024 added the requirement for
'typedef void posix_tnode;'.

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