C++20 where is jthread located?

Question

C++ / C#

I read about the new jthread , I wanted to test it, but the compiler swears that it doesn’t exist. What include is required? 'thread' (in angle brackets) set. I use gcc version 11.1 on Linux, compilation with the g++ test.cpp command

Answer 1

It is necessary to specify the language standard in the compilation line, the default is not new:
g++ -std=c++20 test.cpp

Answer 2

Defined in header <thread>
https://en.cppreference.com/w/cpp/thread/jthread