https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111173
--- Comment #2 from Jan Schultke <janschultke at googlemail dot com> --- I think the problem is that GCC treats "constinit" exactly like "const" for the purpose of diagnostics. In https://eel.is/c++draft/dcl.fct#11, it is said that const applied to functions is ignored. GCC produces error messages like: > <source>:1:1: error: 'constinit' on function return type is not allowed > 1 | constinit void foo(); > | ^~~~~~~~~ This does not make any sense; "constinit" wouldn't apply to the function return type in the first place, but to the declarator-id. See https://eel.is/c++draft/dcl.meaning.general#4
