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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/112899] odr-using constexpr static data member of class
 exported from module results in linker error
Date: Sun, 17 Dec 2023 16:39:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112899

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
                 CC|                            |ppalka at gcc dot gnu.org
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-12-17

--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
It works if we initialize the static data member out of line:

    export module A;

    export struct A
    {
        static const int blub;
    };

constexpr int A::blub =3D 42;


Maybe relatedly, we also ICE streaming out a non-trivially initialized stat=
ic
inline data member:

    export module A;

    export struct A
    {
        static int f() { return -1; }
        static inline int blub =3D f();
    };=