https://gcc.gnu.org/projects/cxx-status.html
https://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2020
https://developers.redhat.com/blog/2020/03/26/static-analysis-in-gcc-10/

12.x
https://gcc.gnu.org/gcc-12/changes.html
    https://developers.redhat.com/articles/2022/04/25/new-c-features-gcc-12
    https://habr.com/ru/company/skillfactory/blog/662932/
    https://www.opennet.ru/opennews/art.shtml?num=57145
https://www.phoronix.com/scan.php?page=news_item&px=GCC-12.0-October-Zen-3-Perf

11.x
https://gcc.gnu.org/gcc-11/
    https://gcc.gnu.org/gcc-11/changes.html
    https://www.opennet.ru/opennews/art.shtml?num=55035
10.x
https://developers.redhat.com/blog/2020/09/24/new-c-features-in-gcc-10/
https://gcc.gnu.org/gcc-10/changes.html
https://gcc.gnu.org/gcc-10/porting_to.html
    https://www.opennet.ru/opennews/art.shtml?num=52903
9.x
https://gcc.gnu.org/gcc-9/changes.html
    http://www.opennet.ru/opennews/art.shtml?num=50622
    http://hubicka.blogspot.com/2019/05/gcc-9-link-time-and-inter-procedural.html
    https://www.gnu.org/software/gcc/gcc-9/changes.html
    https://developers.redhat.com/blog/2019/03/08/usability-improvements-in-gcc-9/
2018
https://gcc.gnu.org/ml/gcc-announce/2018/msg00001.html
http://www.opennet.ru/opennews/art.shtml?num=48535