Version 11.1 of the GCC compiler suite is out.
“This release switches the default debugging format to DWARF 5 on most
targets and switches the default C++ language version to -std=gnu++17.
It makes great progress in the C++20 language support, both on the compiler
and library sides, adds experimental C++23 support, some C2X enhancements,
various optimization enhancements and bug fixes, several new hardware
enablement changes and enhancements to the compiler back-ends and many other
changes.“

Source: LWN.net – GCC 11.1 released