Re: c++/3084: anonymous namespace linking

["Artem Khodush" <artem@duma.gov.ru>]

The following reply was made to PR c++/3084; it has been noted by GNATS.

From: "Artem Khodush" <artem@duma.gov.ru>
To: <conversy@emn.fr>
Cc: <gcc-gnats@gcc.gnu.org>, <gcc-bugs@gcc.gnu.org>
Subject: Re: c++/3084: anonymous namespace linking
Date: Fri, 8 Jun 2001 16:48:55 +0400

 > anonymous namespace functions cannot be linked
 > to global call to these functions.
 > 
 > There is an error when linking an object file with
 > the code of a function declared inside a unnamed
 > "namespace {}".
 > 
 > In the .o that includes the function code, the name
 > is the form *__GLOBAL__* where in the .o that refers
 > to the function code, the name is different.
 > 
 
 This is not a bug, this behavior is requred by the c++ 
 standard, and is the very reason of existence of
 unnamed namespaces.
  
 7.3.1.1 - Unnamed namespaces [namespace.unnamed]
 -1- An unnamed-namespace-definition behaves as if it were 
 replaced by 
 
 namespace 'unique' { /* empty body */ }
 using namespace 'unique';
 namespace 'unique' { namespace-body }
 
 where all occurrences of 'unique' in a translation unit are 
 replaced by the same identifier and this identifier differs 
 from all other identifiers in the entire program.* 
 
 [Footnote: Although entities in an unnamed namespace 
 might have external linkage, they are effectively qualified 
 by a name unique to their translation unit and therefore 
 can never be seen from any other translation unit. 
 --- end footnote]