gating.yaml

@@ -1,6 +1,6 @@
 --- !Policy
 product_versions:
-  - rhel-9
+  - rhel-10
 decision_context: osci_compose_gate
 rules:
   - !PassingTestCaseRule {test_case_name: baseos-ci.brew-build.gate-build-fast-lane.functional}

gcc-toolset-16-gcc.spec

@@ -180,7 +180,7 @@ BuildRequires: gcc-toolset-%{gts_ver}-devel
 Summary: GCC version %{gcc_major}
 Name: %{?scl_prefix}gcc
 Version: %{gcc_version}
-Release: %{gcc_release}.2%{?dist}
+Release: %{gcc_release}.1%{?dist}.alma.2
 # License notes for some of the less obvious ones:
 #   gcc/doc/cppinternals.texi: Linux-man-pages-copyleft-2-para
 #   isl: MIT, BSD-2-Clause
@@ -394,6 +394,10 @@ Patch3015: 0018-Use-CXX11-ABI.patch
 Patch3017: 0020-more-fixes.patch
 Patch3018: 0021-libstdc++-disable-tests.patch
 
+# AlmaLinux Patch
+Patch9001: gcc16-riscv64-extfloat.patch
+Patch9002: gcc16-nonshared-hidden.patch
+
 %if 0%{?rhel} == 10
 %global nonsharedver 140
 %endif
@@ -785,6 +789,10 @@ touch -r isl-0.24/m4/ax_prog_cxx_for_build.m4 isl-0.24/m4/ax_prog_cc_for_build.m
 %patch -P3017 -p1 -b .dts-test-17~
 %patch -P3018 -p1 -b .dts-test-18~
 
+# Applying AlmaLinux Patch
+%patch -P9001 -p1 -b .gcc16-riscv64-extfloat
+%patch -P9002 -p1 -b .gcc16-nonshared-hidden
+
 find gcc/testsuite -name \*.pr96939~ | xargs rm -f
 
 echo 'Red Hat %{version}-%{gcc_release}' > gcc/DEV-PHASE
@@ -1054,7 +1062,11 @@ CONFIGURE_OPTS="\
 %ifarch x86_64
 %if 0%{?rhel} > 8
 %if 0%{?rhel} > 9
+%ifarch x86_64_v2
+	--with-arch_64=x86-64-v2 \
+%else
 	--with-arch_64=x86-64-v3 \
+%endif
 %else
 	--with-arch_64=x86-64-v2 \
 %endif
@@ -1938,16 +1950,24 @@ mkdir -p %{buildroot}%{_root_infodir}
 %if %{build_libasan}
 chmod 755 %{buildroot}%{_prefix}/%{_lib}/libasan.so.8.*
 %if 0%{?scl:1}
+%if 0%{?rhel} < 10
 mkdir -p %{buildroot}%{_root_prefix}/%{_lib}/
 mv %{buildroot}%{_prefix}/%{_lib}/libasan.so.8* %{buildroot}%{_root_prefix}/%{_lib}/
+%else
+rm -f %{buildroot}%{_prefix}/%{_lib}/libasan.so.8*
+%endif
 mkdir -p %{buildroot}%{_root_infodir}
 %endif
 %endif
 %if %{build_libtsan}
 chmod 755 %{buildroot}%{_prefix}/%{_lib}/libtsan.so.2.*
 %if 0%{?scl:1}
+%if 0%{?rhel} < 10
 mkdir -p %{buildroot}%{_root_prefix}/%{_lib}/
 mv %{buildroot}%{_prefix}/%{_lib}/libtsan.so.2* %{buildroot}%{_root_prefix}/%{_lib}/
+%else
+rm -f %{buildroot}%{_prefix}/%{_lib}/libtsan.so.2*
+%endif
 mkdir -p %{buildroot}%{_root_infodir}
 %endif
 %endif
@@ -1966,8 +1986,12 @@ mkdir -p %{buildroot}%{_root_infodir}
 %endif
 %if %{build_libhwasan}
 chmod 755 %{buildroot}%{_prefix}/%{_lib}/libhwasan.so.0.*
+%if 0%{?rhel} < 10
 mkdir -p %{buildroot}%{_root_prefix}/%{_lib}/
 mv %{buildroot}%{_prefix}/%{_lib}/libhwasan.so.0* %{buildroot}%{_root_prefix}/%{_lib}/
+%else
+rm -f %{buildroot}%{_prefix}/%{_lib}/libhwasan.so.0*
+%endif
 mkdir -p %{buildroot}%{_root_infodir}
 %endif
 %if %{build_liblsan}
@@ -3055,13 +3079,16 @@ fi
 %endif
 
 %changelog
-* Mon Jul 27 2026 Marek Polacek <polacek@redhat.com> 16.1.1-4.2
-- adjust libstdc++_nonshared symbols on i686 (RHEL-212570)
+* Fri Aug 14 2026 Eduard Abdullin <eabdullin@almalinux.org> - 16.1.1-4.1.alma.2
+- Fix compilation on RISC-V
+- Use 32-bit manglings in the libstdc++ nonshared .hidden list (fixes i686)
+- Do not assert .hidden on a libstdc++ instantiation that is not emitted below
+  x86-64-v3 (fixes x86_64_v2)
+- Set --with-arch_64=x86-64-v2 on v2 arch
 
 * Tue Jul 14 2026 Marek Polacek <polacek@redhat.com> 16.1.1-4.1
-- fix gating problems (RHEL-194141)
-- adjust libstdc++_nonshared symbols (RHEL-194261)
-- fix asneeded libraries (RHEL-194145)
+- fix gating problems
+- fix asneeded libraries
 - add libgdiagnostics and libgdiagnostics-devel
 
 * Mon Jul  6 2026 Marek Polacek <polacek@redhat.com> 16.1.1-4
@@ -3099,10 +3126,10 @@ fi
 	tree-optimization/125553, tree-optimization/125646,
 	tree-optimization/125652, tree-optimization/125686,
 	tree-optimization/125774, tree-optimization/125776
-- don't remove openacc tests for s390x and ppc64le (RHEL-183931)
+- don't remove openacc tests for s390x and ppc64le (RHEL-181820)
 
 * Wed Jun 17 2026 Marek Polacek <polacek@redhat.com> 16.1.1-3
-- new package (RHEL-160025)
+- new package (RHEL-169581)
 
 * Mon Jun 16 2025 Marek Polacek <polacek@redhat.com> 15.1.1-2.4
 - ship libstdc++.modules.json (RHEL-97095)

gcc16-libstdc++-compat.patch

@@ -5311,7 +5311,7 @@
 +#include "../c++11/assert_fail.cc"
 --- libstdc++-v3/src/nonshared20/tzdb110.cc.jj	2026-05-27 14:24:38.182663933 +0200
 +++ libstdc++-v3/src/nonshared20/tzdb110.cc	2026-05-29 13:49:44.515616477 +0200
-@@ -0,0 +1,56 @@
+@@ -0,0 +1,41 @@
 +// Copyright The GNU Toolchain Authors.
 +//
 +// This file is part of the GNU ISO C++ Library.  This library is free
@@ -5336,25 +5336,15 @@
 +
 +#define _GLIBCXX_NONSHARED_CXX11_110
 +#include "tzdb80.cc"
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE10_M_disposeEv");
 +asm (".hidden _ZNSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEED0Ev");
 +asm (".hidden _ZNSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEED1Ev");
 +asm (".hidden _ZNSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEED2Ev");
-+asm (".hidden _ZGVNSt8__format11_ChronoDataIcE7_S_argsE");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1EOS4_");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2EOS4_");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_assignERKS4_");
 +#ifndef __powerpc64__
 +//asm (".hidden _ZSt23__atomic_wait_address_vIiZNKSt13__atomic_baseIiE4waitEiSt12memory_orderEUlvE_EvPKT_S4_T0_");
 +#endif
-+#ifndef __i386__
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEm");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEmmPKcm");
-+#endif
 +#ifdef __i386__
-+asm (".hidden _ZNSt6chrono14year_month_day12_S_from_daysERKNS_8durationIxSt5ratioILx86400ELx1EEEE");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEj");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEjjPKcj");
++//asm (".hidden _ZSt25__unguarded_linear_insertIN9__gnu_cxx17__normal_iteratorIPNSt6chrono14time_zone_linkESt6vectorIS3_SaIS3_EEEENS0_5__ops14_Val_comp_iterIZNSt6ranges8__detail16__make_comp_projINSB_4lessEMS3_KDoFSt17basic_string_viewIcSt11char_traitsIcEEvEEEDaRT_RT0_EUlOSL_OSN_E_EEEvSL_SN_");
++//asm (".hidden _ZSt25__unguarded_linear_insertIN9__gnu_cxx17__normal_iteratorIPNSt6chrono9time_zoneESt6vectorIS3_SaIS3_EEEENS0_5__ops14_Val_comp_iterIZNSt6ranges8__detail16__make_comp_projINSB_4lessEMS3_KDoFSt17basic_string_viewIcSt11char_traitsIcEEvEEEDaRT_RT0_EUlOSL_OSN_E_EEEvSL_SN_");
 +#endif
 +asm (".hidden _ZZNSt19_Sp_make_shared_tag5_S_tiEvE5__tag");
 +asm (".hidden _ZTSSt19_Sp_make_shared_tag");
@@ -5363,11 +5353,6 @@
 +asm (".hidden _ZTISt11_Mutex_baseILN9__gnu_cxx12_Lock_policyE2EE");
 +asm (".hidden _ZTSSt16_Sp_counted_baseILN9__gnu_cxx12_Lock_policyE2EE");
 +asm (".hidden _ZTISt16_Sp_counted_baseILN9__gnu_cxx12_Lock_policyE2EE");
-+#ifndef __s390x__
-+asm (".hidden _ZNSt6ranges8__detail13__heap_selectIN9__gnu_cxx17__normal_iteratorIPNSt6chrono9time_zoneESt6vectorIS5_SaIS5_EEEENS0_10_Comp_projINS_4lessEMS5_KDoFSt17basic_string_viewIcSt11char_traitsIcEEvEEEEEvT_SK_SK_T0_");
-+#else
-+asm (".hidden _ZNSt6ranges8__detail14__partial_sortIN9__gnu_cxx17__normal_iteratorIPNSt6chrono9time_zoneESt6vectorIS5_SaIS5_EEEENS0_10_Comp_projINS_4lessEMS5_KDoFSt17basic_string_viewIcSt11char_traitsIcEEvEEEEEvT_SK_SK_T0_");
-+#endif
 --- libstdc++-v3/src/nonshared20/sstream-inst80.cc.jj	2026-05-27 14:24:38.182736120 +0200
 +++ libstdc++-v3/src/nonshared20/sstream-inst80.cc	2026-05-29 13:49:44.515616477 +0200
 @@ -0,0 +1,34 @@
@@ -6742,7 +6727,7 @@
 +#include "../c++20/syncbuf.cc"
 --- libstdc++-v3/src/nonshared20/format-inst.cc.jj	2026-05-29 12:21:56.785794864 +0200
 +++ libstdc++-v3/src/nonshared20/format-inst.cc	2026-05-29 15:47:17.971961538 +0200
-@@ -0,0 +1,239 @@
+@@ -0,0 +1,232 @@
 +// Definitions for <format> -*- C++ -*-
 +
 +// Copyright The GNU Toolchain Authors.
@@ -6768,15 +6753,30 @@
 +// <http://www.gnu.org/licenses/>.
 +
 +#include "../c++20/format-inst.cc"
++#if defined(__x86_64__) || defined(__aarch64__) || defined(__powerpc64__)
++asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEEaSEOS4_");
++asm (".hidden _ZNSt8__detail13__to_chars_16ImEESt15to_chars_resultPcS2_T_");
++#else
++asm (".hidden _ZNSt8__detail18__to_chars_10_implImEEvPcjT_");
++#endif
++#if defined(__x86_64__)
++asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE22__resize_and_overwriteIZNKSt8__format14__formatter_fpIwE11_M_localizeESt17basic_string_viewIwS2_EcRKSt6localeEUlPwmE_EEvmT_");
++asm (".hidden _ZNSt8__detail13__to_chars_16IjEESt15to_chars_resultPcS2_T_");
++#endif
 +asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE10_M_disposeEv");
++asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE15_M_replace_coldEPcmPKcmm");
++asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEm");
++asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEmmPKcm");
 +asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9push_backEc");
++asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE10_M_disposeEv");
++asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE15_M_replace_coldEPwmPKwmm");
++asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE9_M_mutateEmmPKwm");
 +asm (".hidden _ZNKSt8__format5_SinkIwE13_M_discardingEv");
 +asm (".hidden _ZNKSt8__format5_SinkIcE13_M_discardingEv");
 +asm (".hidden _ZNKSt8__format13_Padding_sinkINS_10_Sink_iterIcEEcE13_M_discardingEv");
 +asm (".hidden _ZNKSt8__format13_Padding_sinkINS_10_Sink_iterIwEEwE13_M_discardingEv");
 +asm (".hidden _ZNSt8__format14_Fixedbuf_sinkIcE11_M_overflowEv");
 +asm (".hidden _ZNSt8__format14_Fixedbuf_sinkIwE11_M_overflowEv");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE10_M_disposeEv");
 +asm (".hidden _ZNSt12format_errorD2Ev");
 +asm (".hidden _ZTVSt12format_error");
 +asm (".hidden _ZNSt12format_errorD1Ev");
@@ -6793,12 +6793,6 @@
 +asm (".hidden _ZNSt8__format29__failed_to_parse_format_specEv");
 +asm (".hidden _ZNSt8__detail18__to_chars_10_implIjEEvPcjT_");
 +asm (".hidden _ZNSt8__detail18__to_chars_10_implIyEEvPcjT_");
-+#if defined(__x86_64__)
-+asm (".hidden _ZNSt8__detail13__to_chars_16IjEESt15to_chars_resultPcS2_T_");
-+#endif
-+#if defined(__x86_64__) || defined(__powerpc64__) || defined(__aarch64__)
-+asm (".hidden _ZNSt8__detail13__to_chars_16ImEESt15to_chars_resultPcS2_T_");
-+#endif
 +asm (".hidden _ZNSt16basic_format_argISt20basic_format_contextINSt8__format10_Sink_iterIcEEcEE8_M_visitIZNS1_15__do_vformat_toIcLj1EEENS2_IT_EES9_St17basic_string_viewIS8_St11char_traitsIS8_EERS0_IS9_S8_EEUlRS8_E_EEDcOS8_NS1_6_Arg_tE");
 +asm (".hidden _ZNSt8__format5_SpecIwE27_S_parse_width_or_precisionEPKwS3_RtRbRSt26basic_format_parse_contextIwE");
 +asm (".hidden _ZNSt8__format5_SpecIwE14_M_parse_widthEPKwS3_RSt26basic_format_parse_contextIwE");
@@ -6817,11 +6811,11 @@
 +//asm (".hidden _ZNSt8__format5_SinkIcE8_M_writeEc");
 +asm (".hidden _ZNKSt8__format14__formatter_fpIcE6formatIfNS_10_Sink_iterIcEEEENSt20basic_format_contextIT0_cE8iteratorET_RS7_");
 +asm (".hidden _ZNKSt8__format14__formatter_fpIcE6formatIdNS_10_Sink_iterIcEEEENSt20basic_format_contextIT0_cE8iteratorET_RS7_");
-+#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)
++#if defined(__x86_64__) || defined(__aarch64__)
 +asm (".hidden _ZNKSt8__format14__formatter_fpIcE6formatIeNS_10_Sink_iterIcEEEENSt20basic_format_contextIT0_cE8iteratorET_RS7_");
 +asm (".hidden _ZNKSt8__format14__formatter_fpIwE6formatIeNS_10_Sink_iterIwEEEENSt20basic_format_contextIT0_wE8iteratorET_RS7_");
 +#endif
-+#if !defined(__aarch64__)
++#if defined(__x86_64__) || defined(__s390x__) || defined(__powerpc64__)
 +asm (".hidden _ZNKSt8__format14__formatter_fpIcE6formatIgNS_10_Sink_iterIcEEEENSt20basic_format_contextIT0_cE8iteratorET_RS7_");
 +asm (".hidden _ZNKSt8__format14__formatter_fpIwE6formatIgNS_10_Sink_iterIwEEEENSt20basic_format_contextIT0_wE8iteratorET_RS7_");
 +#endif
@@ -6837,6 +6831,7 @@
 +asm (".hidden _ZNSt8__format19_Formatting_scannerINS_10_Sink_iterIwEEwE11_M_on_charsEPKw");
 +asm (".hidden _ZNKSt8__format14__formatter_fpIwE6formatIfNS_10_Sink_iterIwEEEENSt20basic_format_contextIT0_wE8iteratorET_RS7_");
 +asm (".hidden _ZNKSt8__format14__formatter_fpIwE6formatIdNS_10_Sink_iterIwEEEENSt20basic_format_contextIT0_wE8iteratorET_RS7_");
++//asm (".hidden _ZNKSt8__format14__formatter_fpIwE6formatIgNS_10_Sink_iterIwEEEENSt20basic_format_contextIT0_wE8iteratorET_RS7_");
 +//asm (".hidden _ZNKSt9__unicode9__v16_0_022_Grapheme_cluster_viewISt17basic_string_viewIcSt11char_traitsIcEEE9_Iterator11_M_is_breakENS0_13_Gcb_propertyES8_NS_13_Utf_iteratorIcDiPKcSB_NS_5_ReplEEE");
 +asm (".hidden _ZNSt9__unicode9__v16_0_022_Grapheme_cluster_viewISt17basic_string_viewIcSt11char_traitsIcEEE9_IteratorppEv");
 +asm (".hidden _ZNSt8__format13_Padding_sinkINS_10_Sink_iterIcEEcE15_M_force_updateEv");
@@ -6965,23 +6960,6 @@
 +asm (".hidden _ZSt14__add_groupingIcEPT_S1_S0_PKcmPKS0_S5_");
 +asm (".hidden _ZSt14__add_groupingIwEPT_S1_S0_PKcmPKS0_S5_");
 +#endif
-+#ifndef __i386__
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEm");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEmmPKcm");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE9_M_mutateEmmPKwm");
-+#endif
-+#ifndef __s390x__
-+asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEEaSEOS4_");
-+#else
-+asm (".hidden _ZNSt8__detail18__to_chars_10_implImEEvPcjT_");
-+#endif
-+#ifdef __i386__
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEjjPKcj");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEj");
-+//asm (".hidden _ZNSt6ranges8__detail13__heap_selectIN9__gnu_cxx17__normal_iteratorIPNSt6chrono9time_zoneESt6vectorIS5_SaIS5_EEEENS0_10_Comp_projINS_4lessEMS5_KDoFSt17basic_string_viewIcSt11char_traitsIcEEvEEEEEvT_SK_SK_T0_");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE22__resize_and_overwriteIZNKSt8__format14__formatter_fpIwE11_M_localizeESt17basic_string_viewIwS2_EcRKSt6localeEUlPwjE_EEvjT_");
-+asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE9_M_mutateEjjPKwj");
-+#endif
 --- libstdc++-v3/src/nonshared26/text_encoding.cc.jj	2026-05-27 14:24:38.184280865 +0200
 +++ libstdc++-v3/src/nonshared26/text_encoding.cc	2026-05-29 13:49:44.515616477 +0200
 @@ -0,0 +1,23 @@
@@ -8923,7 +8901,7 @@
 +#endif
 --- libstdc++-v3/src/nonshared17/floating_from_chars110.cc.jj	2026-05-27 14:24:38.186570586 +0200
 +++ libstdc++-v3/src/nonshared17/floating_from_chars110.cc	2026-05-29 14:24:00.028653498 +0200
-@@ -0,0 +1,54 @@
+@@ -0,0 +1,53 @@
 +// Copyright (C) 2019-2026 Free Software Foundation, Inc.
 +//
 +// This file is part of the GNU ISO C++ Library.  This library is free
@@ -8967,16 +8945,15 @@
 +//asm (".hidden _ZSt8to_charsPcS_u9__ieee128St12chars_format");
 +//asm (".hidden _ZSt8to_charsPcS_u9__ieee128St12chars_formati");
 +#endif
-+#if defined(__aarch64__) || defined(__i386__) || defined(__s390x__)
++#if defined(__aarch64__) || defined(__i386__)
 +asm (".hidden _ZSt10from_charsIiLi0EESt17from_chars_resultPKcS2_RT_i");
 +#endif
 +#if defined(__i386__) || (defined(__powerpc__) && !defined(__powerpc64__))
 +asm (".hidden _ZNSt3pmr25monotonic_buffer_resource13do_deallocateEPvjj");
 +asm (".hidden _ZNSt3pmr25monotonic_buffer_resource11do_allocateEjj");
-+#endif
-+#if defined(__x86_64__) || defined(__powerpc64__)
-+asm (".hidden _ZNSt3pmr25monotonic_buffer_resource11do_allocateEmm");
-+asm (".hidden _ZNSt3pmr25monotonic_buffer_resource13do_deallocateEPvmm");
++#else
++//asm (".hidden _ZNSt3pmr25monotonic_buffer_resource13do_deallocateEPvmm");
++//asm (".hidden _ZNSt3pmr25monotonic_buffer_resource11do_allocateEmm");
 +#endif
 --- libstdc++-v3/src/nonshared17/cow-fs_ops.cc.jj	2026-05-27 14:24:38.186663457 +0200
 +++ libstdc++-v3/src/nonshared17/cow-fs_ops.cc	2026-05-29 13:49:44.515616477 +0200
@@ -11075,7 +11052,7 @@
 +#if defined(__i386__) || (defined(__powerpc__) && !defined(__powerpc64__))
 +asm (".hidden _ZNSt8__detail18__to_chars_10_implIyEEvPcjT_");
 +#else
-+asm (".hidden _ZNSt8__detail18__to_chars_10_implImEEvPcjT_");
++//asm (".hidden _ZNSt8__detail18__to_chars_10_implImEEvPcjT_");
 +#endif
 +#if !defined(__i386__) && !defined(__s390x__)
 +asm (".hidden _ZSt12__to_chars_iIoESt15to_chars_resultPcS1_T_i");

gcc16-nonshared-hidden.patch

@@ -0,0 +1,42 @@
+--- a/libstdc++-v3/src/nonshared20/format-inst.cc
++++ b/libstdc++-v3/src/nonshared20/format-inst.cc
+@@ -26,21 +26,39 @@
+ #if defined(__x86_64__) || defined(__aarch64__) || defined(__powerpc64__)
+ asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEEaSEOS4_");
+ asm (".hidden _ZNSt8__detail13__to_chars_16ImEESt15to_chars_resultPcS2_T_");
++#elif defined(__i386__)
++asm (".hidden _ZNSt8__detail18__to_chars_10_implIyEEvPcjT_");
+ #else
+ asm (".hidden _ZNSt8__detail18__to_chars_10_implImEEvPcjT_");
+ #endif
+ #if defined(__x86_64__)
++/* Only emitted from the x86-64-v3 ISA level up; below that the compiler
++   inlines it away and the bare .hidden would leave an undefined hidden
++   symbol in libstdc++_nonshared140.a.  */
++#if defined(__AVX2__)
+ asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE22__resize_and_overwriteIZNKSt8__format14__formatter_fpIwE11_M_localizeESt17basic_string_viewIwS2_EcRKSt6localeEUlPwmE_EEvmT_");
++#endif
+ asm (".hidden _ZNSt8__detail13__to_chars_16IjEESt15to_chars_resultPcS2_T_");
+ #endif
+ asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE10_M_disposeEv");
++#if defined(__i386__)
++asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE15_M_replace_coldEPcjPKcjj");
++asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEj");
++asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEjjPKcj");
++#else
+ asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE15_M_replace_coldEPcmPKcmm");
+ asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEm");
+ asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEmmPKcm");
++#endif
+ asm (".hidden _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9push_backEc");
+ asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE10_M_disposeEv");
++#if defined(__i386__)
++asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE15_M_replace_coldEPwjPKwjj");
++asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE9_M_mutateEjjPKwj");
++#else
+ asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE15_M_replace_coldEPwmPKwmm");
+ asm (".hidden _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE9_M_mutateEmmPKwm");
++#endif
+ asm (".hidden _ZNKSt8__format5_SinkIwE13_M_discardingEv");
+ asm (".hidden _ZNKSt8__format5_SinkIcE13_M_discardingEv");
+ asm (".hidden _ZNKSt8__format13_Padding_sinkINS_10_Sink_iterIcEEcE13_M_discardingEv");

gcc16-riscv64-extfloat.patch

@@ -0,0 +1,29 @@
+From 8afa08292030c4da33ebf80ce39353678d9d9955 Mon Sep 17 00:00:00 2001
+From: Andrew Lukoshko <alukoshko@almalinux.org>
+Date: Wed, 18 Feb 2026 14:37:39 +0000
+Subject: [PATCH] libstdc++-v3: add __riscv constants to extfloat.S
+
+---
+ libstdc++-v3/src/nonshared98/extfloat.S | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/libstdc++-v3/src/nonshared98/extfloat.S b/libstdc++-v3/src/nonshared98/extfloat.S
+index c72980884..9fad014c4 100644
+--- a/libstdc++-v3/src/nonshared98/extfloat.S
++++ b/libstdc++-v3/src/nonshared98/extfloat.S
+@@ -53,8 +53,11 @@
+ #elif defined __s390__
+ #define ALIGN1	.align 4
+ #define ALIGN3	.align 2
++#elif defined __riscv
++#define ALIGN1	.align 3
++#define ALIGN3	.align 3
+ #endif
+-#if defined __x86_64__ || defined __powerpc64__ || defined __s390x__ || defined __ia64__ || defined __aarch64__
++#if defined __x86_64__ || defined __powerpc64__ || defined __s390x__ || defined __ia64__ || defined __aarch64__ || defined __riscv
+ #define SIZE1	32
+ #define SIZE2	16
+ #define OFF	16
+-- 
+2.43.7
+