https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119983
--- Comment #3 from Nathaniel Shead <nshead at gcc dot gnu.org> ---
I will note that making the variable internal linkage will silence GCC 15,
since a TU-local variable itself is not an exposure; this is appropriate if you
only need the variable within that TU. For example, adjusting your original
testcase, the following sample is valid:
export module M;
static struct
{
void aRandomFunc()
{
}
} variableWithNamelessType{};
export void foo() {
variableWithNamelessType.aRandomFunc();
}