- Rebuild with GLIBC 2.30.
- Pin modification time for python files to SOURCE_DATE_EPOCH (RHEL-50290).
- Sync libstdc++ pretty printers to latest GTS (RHEL-50290).
- don't reuse DEBUG_EXPRs with vector type (PR middle-end/100508, RHEL-79501)
- rebuild for CVE-2020-11023 (RHEL-78274)
- fix ICE in the vectorizer (RHEL-32886)
- guard the bit test merging code in if-combine (RHEL-11483)
- fix for TLSLD references (#2213753)
- fix crash in dynamic_cast<>() on null pointer (PR c++/99074, #2211506)
- adjust a pattern in s390.md (PR target/87723, #2214847)
- s390x: add support for register arguments preserving (#2168205)
- fix strlen range with a flexible member array (#2137448)
- fix deserialization for std::normal_distribution (#2130392,
  PR libstdc++/105502)
- initialize std::normal_distribution::_M_saved (PR libstdc++/99536)
- reject std::make_shared<T[]> (PR libstdc++/99006)
- avoid changing PHIs in GIMPLE split_edge (#2117838)
- backport straight-line-speculation mitigation (#2108721)
- backport std::regex check for invalid range (#2001788)
- require docbook-style-xsl instead of docbook5-style-xsl (#2073888)
- backport Default widths with -fdec-format-defaults patch (#2074614)
- Fix nop generation in annobin plugin.  (#2067150)
- Add a plugin-annobin subpackage.  (#2067150)
- fix typo in the cprop_hardreg patch (#2028609)
- apply cprop_hardreg fix for narrow mode != lowpart targets (#2028609)
- aarch64: Add -mtune=neoverse-512tvb (#1845932)
- backport PCH tweaks (#2030878)
- avoid cycling on certain subreg reloads (PR rtl-optimization/96796, #2028798)
- when linking against libgcc_s, link libgcc.a too (#2022588)
- add -Wbidi-chars patch (#2008392)