https://gcc.gnu.org/g:cd53e6a50567fe890b5c2266a3b318321fc19a55
commit r13-9079-gcd53e6a50567fe890b5c2266a3b318321fc19a55 Author: Jonathan Wakely <jwak...@redhat.com> Date: Fri Jul 5 20:00:04 2024 +0100 libstdc++: Use reserved form of [[__likely__]] in <variant> We should not use [[unlikely]] before C++20, so use [[__unlikely__]] instead. libstdc++-v3/ChangeLog: * include/std/variant (_Variant_storage::_M_reset): Use __unlikely__ form of attribute instead of unlikely. (cherry picked from commit 9f1cd51766f251aafe0f1b898892f79855892729) Diff: --- libstdc++-v3/include/std/variant | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant index a31b7e772388..1a34a2f2e7f5 100644 --- a/libstdc++-v3/include/std/variant +++ b/libstdc++-v3/include/std/variant @@ -490,7 +490,7 @@ namespace __variant constexpr void _M_reset() { - if (!_M_valid()) [[unlikely]] + if (!_M_valid()) [[__unlikely__]] return; std::__do_visit<void>([](auto&& __this_mem) mutable