[From nobody Wed Apr 22 21:03:04 2026
Received: (at maintonly) by bugs.debian.org; 22 Feb 2026 16:18:37 +0000
X-Spam-Checker-Version: SpamAssassin 4.0.1-bugs.debian.org_2005_01_02
 (2024-03-25) on buxtehude.debian.org
X-Spam-Level: 
X-Spam-Status: No, score=-105.1 required=4.0 tests=BAYES_00,DKIMWL_WL_HIGH,
 DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FOURLA,
 FROMDEVELOPER,MD5_SHA1_SUM,SPF_HELO_NONE,SPF_NONE,UNPARSEABLE_RELAY,
 USER_IN_DKIM_WELCOMELIST,WORD_WITHOUT_VOWELS autolearn=ham
 autolearn_force=no version=4.0.1-bugs.debian.org_2005_01_02
X-Spam-Bayes: score:0.0000 Tokens: new, 10; hammy, 150; neutral, 154; spammy,
 0. spammytokens:
 hammytokens:0.000-+--Hx-spam-relays-external:sk:stravin,
 0.000-+--H*RT:sk:stravin, 0.000-+--Hx-spam-relays-external:311,
 0.000-+--H*RT:311, 0.000-+--H*RT:108
Return-path: &lt;aurel32@debian.org&gt;
Received: from stravinsky.debian.org ([2001:41b8:202:deb::311:108]:48420)
 by buxtehude.debian.org with esmtps
 (TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256)
 (Exim 4.96) (envelope-from &lt;aurel32@debian.org&gt;) id 1vuCAH-00DbTl-2P
 for maintonly@bugs.debian.org; Sun, 22 Feb 2026 16:18:37 +0000
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; 
 s=smtpauto.stravinsky;
 h=X-Debian-User:Content-Type:MIME-Version:Message-ID:
 Subject:To:From:Date:Reply-To:Cc:Content-Transfer-Encoding:Content-ID:
 Content-Description:In-Reply-To:References;
 bh=E7TMQ+GXz4q5AcLyd4TByWPsreccDRSYzbqjZ3r22oU=; b=SI8CREWWSVFJQe7fTrmBZnYGEm
 zh2Q0fOWGaNC2VqFFUHdb9u2v93LJYxHi4sbnXhOBsRFM1PGqjTlVTro8z03N2D5/c13J2DDI2Jg1
 HxORTiSlOoYA/iECU3XpiD9sd88F5ZUIluJgAPGBF9uCxe5bVuA2TuVCVRk8L8s/J1gs+t9zhAesh
 aejfDG7DufsswVOPalPDegrXvkZhuMKWG43WEz0t5TxZTKLHGOAQONqiPbwDODuZ0KpvA9DmqKu2N
 j6Zhhq+9eMG+1elcxglTBnoSOofUJt6vG+cNRTUb7OQx/sAdsrXsDDEChKKsg7Pzgo2naP/UyldqU
 f6eAcdVQ==;
Received: from authenticated user by stravinsky.debian.org with esmtpsa
 (TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256)
 (Exim 4.94.2) (envelope-from &lt;aurel32@debian.org&gt;)
 id 1vuCAH-008JH4-Ge
 for maintonly@bugs.debian.org; Sun, 22 Feb 2026 16:18:36 +0000
Received: from [2a01:e34:ec5d:a741:1ee1:92ff:feb4:5ec0] (helo=ohm.rr44.fr)
 by hall.aurel32.net with esmtpsa (TLS1.3) tls
 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2)
 (envelope-from &lt;aurel32@debian.org&gt;) id 1vuCAF-00000002eMI-2dKC
 for maintonly@bugs.debian.org; Sun, 22 Feb 2026 17:18:35 +0100
Date: Sun, 22 Feb 2026 17:18:35 +0100
From: Aurelien Jarno &lt;aurel32@debian.org&gt;
To: maintonly@bugs.debian.org
Subject: ucx: FTBFS with glibc 2.43 due to ISO C23 const return types
Message-ID: &lt;aZssWzqE7qqgCq_K@aurel32.net&gt;
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/2.2.13 (2024-03-09)
X-Debian-User: aurel32
Delivered-To: maintonly@bugs.debian.org

Source: ucx
Version: 1.20.0+ds-4
Severity: important
Tags: ftbfs upstream
Justification: fails to build from source
User: debian-glibc@lists.debian.org
Usertags: glibc-2.43

Dear maintainer(s),

ucx fails to build from source with glibc 2.43, currently in
experimental. From the build log:

| config/parser.c: In function 'ucs_config_sscanf_bw_spec':
| config/parser.c:649:11: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
|   649 |     delim = strchr(buf, ':');
|       |           ^

...

| cc1: all warnings being treated as errors
| make[4]: *** [Makefile:1675: config/libucs_la-parser.lo] Error 1
| make[4]: *** Waiting for unfinished jobs....
| make[4]: Leaving directory '/build/reproducible-path/ucx-1.20.0+ds/src/ucs'
| make[3]: *** [Makefile:2146: all-recursive] Error 1
| make[3]: Leaving directory '/build/reproducible-path/ucx-1.20.0+ds/src/ucs'
| make[2]: *** [Makefile:802: all-recursive] Error 1
| make[2]: Leaving directory '/build/reproducible-path/ucx-1.20.0+ds'
| make[1]: *** [Makefile:672: all] Error 2
| make[1]: Leaving directory '/build/reproducible-path/ucx-1.20.0+ds'
| dh_auto_build: error: make -j128 returned exit code 2
| make: *** [debian/rules:23: binary] Error 25
| dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2

The full build log is available here [1].

The issue is due to ISO C23 declaration of bsearch, memchr, strchr,
strpbrk, strrchr, strstr, wcschr, wcspbrk, wcsrchr, wcsstr and wmemchr,
which now returns a pointer to a const-qualified type when the input
argument is a pointer to a const-qualified type [2].

I would like to thanks Emanuele Rocca for doing the archive rebuild on
a fast arm64 server.

Regards
Aurelien

[1] https://people.debian.org/~ema/glibc-2.43-rebuilds/output-1/ucx_arm64.build
[2] https://sourceware.org/git/?p=glibc.git;a=blob;f=NEWS;h=e271fb2e4d76903c77a302aaec1ca22ce31027d0;hb=f762ccf84f122d1354f103a151cba8bde797d521#l19

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                     http://aurel32.net
]