DMARC-Filter:	OpenDMARC Filter v1.4.2 delorie.com 60FF0qud1715689
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 60FF0qud1715689
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=SJWNOC/1
X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org D4AE44BA23C7
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1768489251;
	bh=5CCVdGT1lZ01Ve1yEzKH84CTk0Sb7OToOjyn06BRk+4=;
	h=Date:To:Subject:In-Reply-To:References:List-Id:List-Unsubscribe:
	List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	From;
	b=SJWNOC/1D04j2g+bhv6pTbBV6bmBWRPCqcsOMHJEOWIDFcxoQaGaCPTWheOuK7Elp
	VkB0uHuWSVUeOQDY0sCNHjXLS6z0nkP2iNMnhCJIma5tPQ6V9xosC6Clo4ShWqbmIx
	wO7hmWTM2MdAZ1XoLauBCifcAuuSgIQ5gpbqK2Gc=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.4.2 sourceware.org D7ED94BA2E06
ARC-Filter:	OpenARC Filter v1.0.0 sourceware.org D7ED94BA2E06
ARC-Seal:	i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1768489198; cv=none;
	b=R0f20rp4m3xQ9j75b5hJ3BGquabe9gPo0uX0VvlIgloY2YAe8+cDPZbEzHtyQ+55MqqR3zcfEwx+qBC1R15j1o8IXdmWNJa8VcREstDtJk0JJVmZpeWrSG38ftVzxzUT4xBo3BBh4a49h/A692lo3oSZyiy8Ej0Mc8IEXr6hgow=
ARC-Message-Signature:	i=1; a=rsa-sha256; d=sourceware.org; s=key;
	t=1768489198; c=relaxed/simple;
	bh=/EENeQVinsDvGPbu/Obh2AFuMEwmIHWzdsX4fw+kf+8=;
	h=Date:From:To:Subject:Message-Id:Mime-Version:DKIM-Signature;
	b=jSb9jZNZdj7cxRC287VhwgD9KYcf7JAg31yugEz+lXOxdlVSHxuGopSWUvzBj6lg1UvvVQ3XjToz/40YfFHh7/D1Tms68/zVxeGiol70VqyBiT48sESsFPlHFWpbXqVo6PJZ2fknzopKxqAgEaQnQCDhVriKIeodxJ+fBXwBVIs=
ARC-Authentication-Results:	i=1; server2.sourceware.org
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org D7ED94BA2E06
Date:	Thu, 15 Jan 2026 23:59:54 +0900
To:	cygwin AT cygwin DOT com
Subject:	Re: Request to update libc++ related packages for current
	Clang/LLVM toolchain
Message-Id:	<20260115235954.0abd10336dcd63067e1a0a06@nifty.ne.jp>
In-Reply-To:	<20260115215321.2bc9368897b5b60557bd2485@nifty.ne.jp>
References:	<CAB2Wiyzf+1E_DJ2ofNEJVE4KVR1QytebgjwMixQkMcx7DSJ1jQ AT mail DOT gmail DOT com>
	<20260115215321 DOT 2bc9368897b5b60557bd2485 AT nifty DOT ne DOT jp>
X-Mailer:	Sylpheed 3.7.0 (GTK+ 2.24.30; i686-pc-mingw32)
Mime-Version:	1.0
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:	Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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>

On Thu, 15 Jan 2026 21:53:21 +0900
Takashi Yano wrote:
> On Sun, 11 Jan 2026 23:11:00 +0200
> Florin wrote:
> > Hello Cygwin list,
> > 
> > I$B!G(Bve noticed that the Clang/LLVM stable packages in Cygwin are at version
> > 20.1.x, while the libc++-devel, libc++1, libc++abi-devel, libc++abi1,
> > libunwind-devel and libunwind1 packages are still at 8.0.1. According to
> > the package summaries, they were last updated in 2019.
> > 
> > This version mismatch can present issues using modern C++ features and
> > makes it hard to use a complete LLVM toolchain with libc++ on Cygwin.
> > 
> > I searched the Cygwin mailing list archives for prior posts about updating
> > libc++, but I didn$B!G(Bt find a clear request or discussion about coordinating
> > libc++ versions with newer Clang.
> > 
> > Could you clarify if there is a plan to update libc++ to match more recent
> > LLVM releases, or if the recommended C++ standard library for newer and
> > future Clang versions on Cygwin should be libstdc++.
> > 
> > Thank you for your time and I'm grateful for the effort you all put into
> > this project.
> 
> I have just uploaded libcxx, compiler-rt, and libunwind packages.
> However, you cannot use them with -stdlib=libc++, -rtlib=compiler-rt,
> and -unwindlib=libunwind. This is because clang package has incomplete
> cygwin driver.
> 
> You can link them to, for example hello.cc, with:
> clang++ -stdlib=libc++ -isystem /usr/include/c++/v1 hello.cc -lc++ $(clang --print-resource-dir)/lib/cygwin/libclang_rt.builtins-x86_64.a -lunwind
> 
> The resulted a.exe will be free from libgcc_s. Please try.

I also uploaded 21.1.4-1 (Test) which works with clang/llvm 21.1.4-1 (Test).
This test version does not have the problem above.

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

-- 
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 -