[Bug c++/95686] New: undefined reference to static local variable within inline function

[leni536 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95686

            Bug ID: 95686
           Summary: undefined reference to static local variable within
                    inline function
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: leni536 at gmail dot com
  Target Milestone: ---

The following code produces an "undefined reference to `foo()::i'" linker
error:

template <const int* ptr>
struct S {
    static constexpr const int* value = ptr;
};

inline
auto foo() {
    static const int i = 0;
    return S<&i>{};
}

#include <iostream>

int main() {
    std::cout << decltype(foo())::value;
}