On Tue, 29 Apr 2025 at 01:17, Marcel Laverdet wrote:
>
> I ran into the following error while attempting to compile the following
> simple case in gcc 15.1.0. gcc 14 and clang 20 compile it without any
> problems. Is this a regression or is this behavior expected?
I'm not sure but I got confused and thought this was an email to the
bugzilla account request address not to gcc-help, and so I created an
account for you. Please go ahead and file a bug, and the maintainers
can respond and close it if the change is intentional. You can use
the password reset link to take control of the new account and login.
>
>
> root[18:56:11] [/workspace] $ cat a.h
> constexpr int flag = 0;
> constexpr bool check() {
> return flag == 0;
> }
>
> root[18:57:41] [/workspace] $ cat a.cc
> module;
> #include "a.h"
> export module M;
> export using ::check;
>
> root[18:57:54] [/workspace] $ gcc-14 -fmodules-ts -c a.cc
> # it compiles fine
>
> root[18:57:57] [/workspace] $ gcc-15 -fmodules-ts -c a.cc
> In file included from a.cc:2:
> a.h:2:16: error: 'constexpr bool check()' exposes TU-local entity 'flag'
> 2 | constexpr bool check() {
> | ^~~~~
> a.h:1:15: note: 'flag' declared with internal linkage
> 1 | constexpr int flag = 0;
> | ^~~~
>
> root[18:58:00] [/workspace] $ gcc-15 --version
> gcc-15 (Debian 15.1.0-1) 15.1.0
> Copyright (C) 2025 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.
