DMARC-Filter:	OpenDMARC Filter v1.4.2 delorie.com 644LrKjn292381
Authentication-Results:	delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com
Authentication-Results:	delorie.com; spf=pass smtp.mailfrom=cygwin.com
DKIM-Filter:	OpenDKIM Filter v2.11.0 delorie.com 644LrKjn292381
Authentication-Results:	delorie.com;
	dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=BCjM9I+U
X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 10B7B4BAD17F
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1777931598;
	bh=mk8hBI9dQM+URxwec8yYQq1FD/hlSxsYksQfGT5TNHs=;
	h=Subject:To:References:Date:In-Reply-To:List-Id:List-Unsubscribe:
	List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	From;
	b=BCjM9I+Uf8PSRVY7Inm/ikr+5FRYTAOg5m0Yc5WVN3x7lU4H5eGhp/znA/S+FnDpa
	5lVhqDlrphq+lQC9qwPBEOG19ptWGTzpE14F8PY8S2sVann0EtRiL1K+qZOr9BjGLh
	vHz4aEgXVE/tE7KXCU0Q3ccJbIHsrKS6hXHcD2Ow=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.4.2 sourceware.org 164214BA79A4
ARC-Filter:	OpenARC Filter v1.0.0 sourceware.org 164214BA79A4
ARC-Seal:	i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1777931540; cv=none;
	b=kHo2o6zAKEj4nIP2BfaqnW5uqp4HQFDmzHZbE2s6i3PmzB2ACXZlKVwwXoDDQWFl19CF2qM1kh//h3zr2GN075g42jzHg5SlqiUBxAfvMrIoxFd6i3GaT6jMTwrLxi1CFVebyA/sGN5tgN+ypkikfTt8GST42DEw0c+MFrhB4Vk=
ARC-Message-Signature:	i=1; a=rsa-sha256; d=sourceware.org; s=key;
	t=1777931540; c=relaxed/simple;
	bh=/qBmvBmH3d1waWRmwvwVxQRsy1jf1f7XmoCXgBwAVWg=;
	h=DKIM-Signature:Subject:To:From:Message-ID:Date:MIME-Version;
	b=C7ADscoW2swiXgD5VW/DIDZ2onNQtoAPGaMXFKZbYWHY1c1lO3qd4ChqeBStj/cDg0GkWZNE6DzcqYEbMhp5SKdV9QNsc/gjOnXaMLwBesSmlhxUdc7A+hOVO0Qzbui4WSVJU7UmvhV+DAqga5cqQG1RrJjkRjazKrclofRouU0=
ARC-Authentication-Results:	i=1; server2.sourceware.org
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 164214BA79A4
Subject:	Re: wcwidth broken with gcc 16
To:	cygwin AT cygwin DOT com
References:	<a9676834-0368-4a8a-88b0-da5e9483b536 AT towo DOT net>
	<874ikpawdk DOT fsf AT Gerda DOT invalid>
	<8ff2ab8d-dfdc-459c-96f3-ed4a4f451440 AT towo DOT net>
	<0140C1F4-CA22-46DE-AE21-69C5427C59B5 AT unified-streaming DOT com>
	<e94174b7-ea9b-45ca-bfd3-7979ce988920 AT towo DOT net>
	<e362b49c-521c-4cd5-8963-c17d5770619b AT SystematicSW DOT ab DOT ca>
Organization:	WiseMo A/S
Message-ID:	<fbbeb91a-4c5a-dbe6-1bb3-206cf14a73bc@wisemo.com>
Date:	Mon, 4 May 2026 23:52:05 +0200
X-Mailer:	Epyrus/2.2.0
MIME-Version:	1.0
In-Reply-To:	<e362b49c-521c-4cd5-8963-c17d5770619b@SystematicSW.ab.ca>
X-Content-Filtered-By:	Mailman/MimeDel 2.1.30
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.30
List-Id:	General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe:	<https://cygwin.com/mailman/options/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive:	<https://cygwin.com/pipermail/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe:	<https://cygwin.com/mailman/listinfo/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From:	Jakob Bohm via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Jakob Bohm <jb AT wisemo DOT com>
Errors-To:	cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>
X-MIME-Autoconverted:	from base64 to 8bit by delorie.com id 644LrKjn292381

On 03/05/2026 18:14, Brian Inglis via Cygwin wrote:
> On 2026-05-03 06:00, Thomas Wolff via Cygwin wrote:
>> Am 03.05.2026 um 12:58 schrieb Dimitry Andric:
>>> On 3 May 2026, at 12:47, Thomas Wolff via Cygwin <cygwin AT cygwin DOT com> 
>>> wrote:
>>>> Am 03.05.2026 um 07:35 schrieb ASSI via Cygwin:
>>>>> Thomas Wolff via Cygwin writes:
>>>>>> Observed with gcc 16:
>>>>>> For a number of character ranges, mainly (but not only) from CJK
>>>>>> ranges, wcwidth incorrectly reports width 1 instead of 2, 0, or -1.
>>>>>> Test file attached.
>>>>> Can you report this upstream, please?
>>>> I couldn't yet test it with gcc 16 on Linux as there is no Debian 
>>>> package.
>>>> Did you test it?
>>> It looks like BSD-based libc gives 1 for U+D7C6, U+D7CB and U+D7CB, 
>>> while glibc gives 0.
>> Thanks. Despite some differences, none of them gives the broken 
>> results of gcc-16 on cygwin, so I wonder whether it makes sense to 
>> report upstream at this time.
>
> It appears that libiberty does not contain any mb/wc macros/functions, 
> , and only contains safe-ctype IS... macros/functions with fixed ASCII 
> characters.
>
> Does gcc, like most GNU products, include some release of gnulib?
> Could gnulib or gcc config detect some lack of support and "fix" 
> newlib-cygwin support of Unicode properties declared in 
> wchar.h/wctype.h, or used in i18n, libunistring, and Unicode string 
> functions, especially if doing any kind of cross-bootstrap?
>
>     https://www.gnu.org/software/gnulib/MODULES.html
>
> I also note that w32api-headers/runtime are gcc runtime dependencies 
> and hope they are used only in COFF/PE-related generation?
>
Under Cygwin, does wcwidth() use Cygwin-provided table, derived either 
from upstream Unicode data or from Windows OS APIs that use OS bundled 
Unicode data?


-- 
Jakob Bohm, CIO, partner, WiseMo A/S. https://www.wisemo.com
Transformervej 29, 2860 Soborg, Denmark. direct: +45 31 13 16 10 
<tel:+4531131610>
This message is only for its intended recipient, delete if misaddressed.
WiseMo - Remote Service Management for PCs, Phones and Embedded

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple

- Raw text -