Proposed resolution (June, 2009):

Change 6.6 [basic.link] paragraph 8 as follows:

...A type without linkage shall not be used as the type of a variable or function with external linkage, unless

• the variable or function has extern "C" C language linkage (9.12 [dcl.link]), or

• the variable or function is declared within an unnamed namespace (9.9.2 [namespace.def]), or

• the variable or function is not used (6.3 [basic.def.odr]) or is defined in the same translation unit.

[Drafting note: the context shown for the preceding resolution assumes that the resolution for issue 757 has been applied.]