Hi! The __cpp_consteval macro and corresponding test have been initially commented out because the consteval support didn't have virtual consteval method support. The r11-1789-ge6321c4508b2a85c21246c1c06a8208e2a151e48 change enabled the macro but didn't enable the corresponding test.
Bootstrapped/regtested on x86_64-linux and i686-linux, committed to trunk as obvious. 2021-06-10 Jakub Jelinek <ja...@redhat.com> * g++.dg/cpp2a/feat-cxx2a.C: Uncomment __cpp_consteval test. * g++.dg/cpp23/feat-cxx2b.C: Likewise. --- gcc/testsuite/g++.dg/cpp2a/feat-cxx2a.C.jj 2020-11-14 10:40:11.257409305 +0100 +++ gcc/testsuite/g++.dg/cpp2a/feat-cxx2a.C 2021-06-09 15:52:00.827892897 +0200 @@ -520,13 +520,11 @@ # error "__cpp_constexpr_in_decltype != 201711" #endif -/* Not supported fully yet: #ifndef __cpp_consteval # error "__cpp_consteval" #elif __cpp_consteval != 201811 # error "__cpp_consteval != 201811" #endif -*/ #ifndef __cpp_concepts # error "__cpp_concepts" --- gcc/testsuite/g++.dg/cpp23/feat-cxx2b.C.jj 2020-11-14 10:40:11.257409305 +0100 +++ gcc/testsuite/g++.dg/cpp23/feat-cxx2b.C 2021-06-09 15:52:00.827892897 +0200 @@ -520,13 +520,11 @@ # error "__cpp_constexpr_in_decltype != 201711" #endif -/* Not supported fully yet: #ifndef __cpp_consteval # error "__cpp_consteval" #elif __cpp_consteval != 201811 # error "__cpp_consteval != 201811" #endif -*/ #ifndef __cpp_concepts # error "__cpp_concepts" Jakub