--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/g++.dg/lookup/missing-std-include-9.C Thu Feb 13 11:34:05 2020 +0900 @@ -0,0 +1,3 @@ +std::byte b; // { dg-error "byte" } +// { dg-message "cstddef" "" { target c++17 } .-1 } +// { dg-message "C..17" "" { target c++14_down } .-2 }