История изменений

https://en.cppreference.com/w/cpp/header/execution никакой это просто С++17 вроде

C++17 Support in GCC

GCC has almost full support for the latest revision of the C++ standard, which was published in 2017. Some library features are missing or incomplete, as described in the library documentation.

C++17 features are available since GCC 5. To enable C++17 support, add the command-line parameter -std=c++17 to your g++ command line. Or, to enable GNU extensions in addition to C++17 features, add -std=gnu++17.

как-то так в общем.

https://en.cppreference.com/w/cpp/header/execution никакой это просто С++17 вроде