Your message dated Thu, 26 Feb 2026 05:18:42 +0000
with message-id <[email protected]>
and subject line Bug#1128648: fixed in gcc-16 16-20260226-1
has caused the Debian Bug report #1128648,
regarding libstdc++-16-dev: generating module std breaks on mising submdspan*
declarations
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
1128648: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1128648
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: libstdc++-16-dev
Version: 16-20260217-1
Severity: minor
Dear Maintainer,
To use "import std;", one needs to generate a precompiled std.gcm file
first. Doing this with -std=c++26 is currently broken:
$ g++-16 -std=c++26 -g3 -O3 -fmodules -fsearch-include-path -c bits/std.cc -o
/dev/null
/usr/include/c++/16/bits/std.cc:1918:14: error: ‘submdspan_canonicalize_slices’
has not been declared in ‘std’
1918 | using std::submdspan_canonicalize_slices;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/16/bits/std.cc:1919:14: error: ‘submdspan_extents’ has not
been declared in ‘std’
1919 | using std::submdspan_extents;
| ^~~~~~~~~~~~~~~~~
It does still work with -std=c++20 and c++23, though. This is probably a
minor issue until c++26 is released.
Thanks,
Ingo
-- System Information:
Distributor ID: Devuan
Description: Devuan GNU/Linux 7 (freia/ceres)
Release: 7
Codename: freia ceres
Architecture: x86_64
Kernel: Linux 6.19.0-spatz20260211 (SMP w/4 CPU threads)
Kernel taint flags: TAINT_FIRMWARE_WORKAROUND, TAINT_OOT_MODULE,
TAINT_RANDSTRUCT
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: sysvinit (via /sbin/init)
Versions of packages libstdc++-16-dev depends on:
ii gcc-16-base 16-20260217-1
ii libc6-dev 2.42-13
ii libgcc-16-dev 16-20260217-1
ii libstdc++6 16-20260217-1
libstdc++-16-dev recommends no packages.
Versions of packages libstdc++-16-dev suggests:
pn libstdc++-16-doc <none>
-- no debconf information
--- End Message ---
--- Begin Message ---
Source: gcc-16
Source-Version: 16-20260226-1
Done: Matthias Klose <[email protected]>
We believe that the bug you reported is fixed in the latest version of
gcc-16, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Matthias Klose <[email protected]> (supplier of updated gcc-16 package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
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Hash: SHA512
Format: 1.8
Date: Thu, 26 Feb 2026 06:00:27 +0100
Source: gcc-16
Architecture: source
Version: 16-20260226-1
Distribution: experimental
Urgency: medium
Maintainer: Debian GCC Maintainers <[email protected]>
Changed-By: Matthias Klose <[email protected]>
Closes: 1128648
Changes:
gcc-16 (16-20260226-1) experimental; urgency=medium
.
* Snapshot, taken from the trunk (20260226). Also closes: #1128648.
* Disable again profiled+lto build on armhf.
* Fix s390x backport builds.
* Disable dwz on riscv64, see
https://sourceware.org/bugzilla/show_bug.cgi?id=33929.
* Disable profiled+lto build. See https://gcc.gnu.org/PR124238.
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