Control: reopen -1 Control: reassign -1 g++-8 Control: found -1 8.2.0-14 I had a look, and this issue still exist with GCC 8.2. Reassigning as appropriate.
% gcc c++-noreturn.c c++-noreturn.c: In function 'stop_now': c++-noreturn.c:10:1: warning: 'noreturn' function does return } ^ % clang c++-noreturn.c c++-noreturn.c:10:1: warning: function declared 'noreturn' should not return [-Winvalid-noreturn] } ^ 1 warning generated. % c++ c++-noreturn.c c++-noreturn.c:7:1: error: 'noreturn' does not name a type noreturn void stop_now(int i) // or _Noreturn void stop_now(int i) ^~~~~~~~ c++-noreturn.c: In function 'int main()': c++-noreturn.c:15:3: error: 'stop_now' was not declared in this scope stop_now(2); ^~~~~~~~ % c++ --version c++ (Debian 8.2.0-14) 8.2.0 Copyright (C) 2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. % -- Happy hacking Petter Reinholdtsen