{"id":2226093,"url":"http://patchwork.ozlabs.org/api/patches/2226093/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/patch/20260422082732.318845-1-tkaminsk@redhat.com/","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/projects/17/?format=json","name":"GNU Compiler Collection","link_name":"gcc","list_id":"gcc-patches.gcc.gnu.org","list_email":"gcc-patches@gcc.gnu.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260422082732.318845-1-tkaminsk@redhat.com>","list_archive_url":null,"date":"2026-04-22T08:27:12","name":"libstdc++: Add _GLIBCXX_RESOLVE_LIB_DEFECTS for alredy implemented issues.","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"53cd4872fd2fc9925b955e31928aa39034e5e039","submitter":{"id":90409,"url":"http://patchwork.ozlabs.org/api/people/90409/?format=json","name":"Tomasz Kaminski","email":"tkaminsk@redhat.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/20260422082732.318845-1-tkaminsk@redhat.com/mbox/","series":[{"id":500942,"url":"http://patchwork.ozlabs.org/api/series/500942/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/list/?series=500942","date":"2026-04-22T08:27:12","name":"libstdc++: Add _GLIBCXX_RESOLVE_LIB_DEFECTS for alredy implemented issues.","version":1,"mbox":"http://patchwork.ozlabs.org/series/500942/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2226093/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2226093/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=G7d2WVrE;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; 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charset=\"US-ASCII\"; x-default=true","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"This covers issue affecting pre-C+26 features that were resolved\nduring 2026 Croydon meeting.\n\nlibstdc++-v3/ChangeLog:\n\n\t* include/bits/chrono_io.h: Add comment for LWG3831.\n\t* include/bits/print.h: Add comment for LWG4549.\n\t* include/std/condition_variable: Add comment for LWG3504.\n\t* include/std/format: Add comments for LWG4522.\n\t* include/std/inplace_vector: Add comment for LWG4122.\n\t* include/std/mdspan: Add comment for LWG4314.\n\t* include/std/optional: Add comment for LWG2746.\n---\nOK for trunk?\n\n libstdc++-v3/include/bits/chrono_io.h | 2 ++\n libstdc++-v3/include/bits/print.h | 2 ++\n libstdc++-v3/include/std/condition_variable | 2 ++\n libstdc++-v3/include/std/format | 4 ++++\n libstdc++-v3/include/std/mdspan | 2 ++\n libstdc++-v3/include/std/optional | 2 ++\n 6 files changed, 14 insertions(+)","diff":"diff --git a/libstdc++-v3/include/bits/chrono_io.h b/libstdc++-v3/include/bits/chrono_io.h\nindex f5a0a65a48d..1fe50ad79e0 100644\n--- a/libstdc++-v3/include/bits/chrono_io.h\n+++ b/libstdc++-v3/include/bits/chrono_io.h\n@@ -1313,6 +1313,8 @@ namespace __format\n \n \t int __yi = (int)__y;\n \t const bool __is_neg = __yi < 0;\n+\t // _GLIBCXX_RESOLVE_LIB_DEFECTS\n+\t // 3831. Two-digit formatting of negative year is ambiguous\n \t __yi = __builtin_abs(__yi);\n \t int __ci = __yi / 100;\n \t // For floored division -123//100 is -2 and -100//100 is -1\ndiff --git a/libstdc++-v3/include/bits/print.h b/libstdc++-v3/include/bits/print.h\nindex 17567f2f554..20724844726 100644\n--- a/libstdc++-v3/include/bits/print.h\n+++ b/libstdc++-v3/include/bits/print.h\n@@ -282,6 +282,8 @@ namespace __format\n vprint_nonunicode_buffered(FILE* __stream, string_view __fmt,\n \t\t\t format_args __args)\n {\n+ // _GLIBCXX_RESOLVE_LIB_DEFECTS\n+ // 4549. vprint_nonunicode_buffered ignores its stream parameter\n __format::_Str_sink __buf;\n std::vformat_to(__buf.out(), __fmt, __args);\n auto __out = __buf.view();\ndiff --git a/libstdc++-v3/include/std/condition_variable b/libstdc++-v3/include/std/condition_variable\nindex 9e515123e7c..ce995ed5777 100644\n--- a/libstdc++-v3/include/std/condition_variable\n+++ b/libstdc++-v3/include/std/condition_variable\n@@ -163,6 +163,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n wait_for(unique_lock& __lock,\n \t const chrono::duration<_Rep, _Period>& __rtime)\n {\n+\t// _GLIBCXX_RESOLVE_LIB_DEFECTS\n+\t// 3504. condition_variable::wait_for is overspecified\n \tusing __dur = typename steady_clock::duration;\n \treturn wait_until(__lock,\n \t\t\t steady_clock::now() +\ndiff --git a/libstdc++-v3/include/std/format b/libstdc++-v3/include/std/format\nindex 92add1e0a01..4627381fa9e 100644\n--- a/libstdc++-v3/include/std/format\n+++ b/libstdc++-v3/include/std/format\n@@ -1718,6 +1718,8 @@ namespace __format\n \t {\n \t _CharT __wbuf[__buf_size];\n \t size_t __n = __narrow_str.size();\n+\t // _GLIBCXX_RESOLVE_LIB_DEFECTS\n+\t // 4522. Clarify that `std::format` transcodes for `std::wformat_strings`\n \t std::__to_wstring_numeric(__narrow_str.data(), __n, __wbuf);\n \t return _M_format_int(basic_string_view<_CharT>(__wbuf, __n),\n \t\t\t\t __prefix_len, __fc);\n@@ -2304,6 +2306,8 @@ namespace __format\n #ifdef _GLIBCXX_USE_WCHAR_T\n \t else\n \t {\n+\t // _GLIBCXX_RESOLVE_LIB_DEFECTS\n+\t // 4522. Clarify that `std::format` transcodes for `std::wformat_strings`\n \t __wstr = std::__to_wstring_numeric(__narrow_str);\n \t __str = __wstr;\n \t }\ndiff --git a/libstdc++-v3/include/std/mdspan b/libstdc++-v3/include/std/mdspan\nindex f30c5e83d16..14d8edc8ad1 100644\n--- a/libstdc++-v3/include/std/mdspan\n+++ b/libstdc++-v3/include/std/mdspan\n@@ -103,6 +103,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n \t }\n \telse\n \t {\n+\t // _GLIBCXX_RESOLVE_LIB_DEFECTS\n+\t // 4314. Missing move in mdspan layout mapping::operator()\n \t auto __ret = static_cast<_IndexType>(std::forward<_OIndexTypeRef>(__other));\n \t if constexpr (std::is_signed_v<_IndexType>)\n \t __glibcxx_assert(__ret >= 0);\ndiff --git a/libstdc++-v3/include/std/optional b/libstdc++-v3/include/std/optional\nindex 49ba7b6b45d..d0fa306addb 100644\n--- a/libstdc++-v3/include/std/optional\n+++ b/libstdc++-v3/include/std/optional\n@@ -1145,6 +1145,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n \t return *this;\n \t}\n \n+ // _GLIBCXX_RESOLVE_LIB_DEFECTS\n+ // 2746. Inconsistency between requirements for emplace between optional and variant\n template\n \t_GLIBCXX20_CONSTEXPR\n \tenable_if_t, _Tp&>\n","prefixes":[]}