http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58885
Daniel Krügler <daniel.kruegler at googlemail dot com> changed:
What |Removed |Added
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CC| |daniel.kruegler@googlemail.
| |com
--- Comment #2 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
The linker is correct to signal an error here, because the explicit
specialization
template<>
CGEnum<int, Test_Enum>::instances_list
CGEnum<int, Test_Enum>::msInstances;
is considered a non-defining declaration as of 14.7.3 p13:
"An explicit specialization of a static data member of a template or an
explicit specialization of a static data member template is a definition if the
declaration includes an initializer; otherwise, it is a declaration."
The necessary fix is to provide the initializer, because the corresponding
entity is odr-used in the program:
template<>
CGEnum<int, Test_Enum>::instances_list
CGEnum<int, Test_Enum>::msInstances{};
