| Storage Class Specifier | At Namespace Scope | Linkage for Functions at Class Scope | At Block Scope |
|---|---|---|---|
| name | same as extern | external linkage | same as extern |
| auto | - | - | - |
| extern | external linkage unless previously declared with internal linkage | - | external linkage unless previously declared with internal linkage in an enclosing scope |
| register | - | - | - |
| static | internal linkage | external linkage | - |
| Note: An empty entry indicates an invalid combination of scope and storage class specifiers. | |||