[C++20] Coroutine header file requires -fcoroutines #469
Description
header file cannot be included for C++20 features. It reports the following error:
/usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/coroutine:334:2: error: "the coroutine header requires -fcoroutines"
#error "the coroutine header requires -fcoroutines"