[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Bug#1000398: marked as done (libstdc++-11-dev: Failed to compile with clang++ C++20 mode due to chenges of std::valarray.)

Your message dated Thu, 16 Dec 2021 03:36:36 +0100
with message-id <b3494e06-5f7c-7959-e47f-f113c21fc195@debian.org>
and subject line fixed in 11.2.0-13
has caused the Debian Bug report #1000398,
regarding libstdc++-11-dev: Failed to compile with clang++ C++20 mode due to chenges of std::valarray.
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.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
1000398: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1000398
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: libstdc++-11-dev
Version: 11.2.0-12
Severity: important

Dear Maintainer,

When compiling any C++20 source code using std::valarray with clang++,
failed to compile with below message:
---
/usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/valarray:foo:var error: exception specification in declaration does not match previous declaration
---

Because /usr/include/c++/11/valarray includes
/usr/include/c++/11/bits/valarray_array.h .

These decl. begin(valarray<_Tp>& __va) variants,
but recent version (11.2.0-12) changes /usr/include/c++/11/valarray
from older version (11.2.0-10) decl. of begin().

These added [[__nodiscard__]] and noexcept to recent version.

These changes violates specificaton P0012R1 after C++17,
clang++ checks this correctly , but g++ (<= 11) not seems to check this.

See,
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0012r1.html

Best regards,
Ohta.


-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-security'), (500, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.15.0-1-amd64 (SMP w/12 CPU threads)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=ja_JP.UTF-8, LC_CTYPE=ja_JP.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libstdc++-11-dev depends on:
ii  gcc-11-base    11.2.0-12
ii  libc6-dev      2.32-4
ii  libgcc-11-dev  11.2.0-12
ii  libstdc++6     11.2.0-12

libstdc++-11-dev recommends no packages.

Versions of packages libstdc++-11-dev suggests:
ii  libstdc++-11-doc  11.2.0-12

-- no debconf information

--- End Message ---
--- Begin Message --- 
Version: 11.2.0-13

Fixed.

--- End Message ---
Reply to: