This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
c++/3084: anonymous namespace linking
- To: gcc-gnats at gcc dot gnu dot org
- Subject: c++/3084: anonymous namespace linking
- From: conversy at emn dot fr
- Date: 8 Jun 2001 11:49:05 -0000
- Reply-To: conversy at emn dot fr
>Number: 3084
>Category: c++
>Synopsis: anonymous namespace linking
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: wrong-code
>Submitter-Id: net
>Arrival-Date: Fri Jun 08 04:56:02 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: conversy@emn.fr
>Release: gcc version 3.0 20010426 (Debian prerelease)
>Organization:
>Environment:
i386-linux
>Description:
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.
>How-To-Repeat:
g++ AB.cpp test.cpp
gives: undefined reference to `(anonymous namespace)::operator<<(std::ostream&, (anonymous namespace)::A const&)'
AB.h:
namespace std {
struct ostream {};
extern ostream cout;
};
namespace {
struct A {};
std::ostream& operator<<(std::ostream&, const A&);
}
namespace foo {
struct B {};
}
std::ostream& operator<<(std::ostream&, const foo::B&);
AB.cpp:
#include "AB.h"
namespace {
std::ostream& operator<<(std::ostream& out, const A&) { return out; }
}
std::ostream& operator<<(std::ostream& out, const foo::B&) { return out; }
test.cpp:
#include "AB.h"
main()
{
A a;
std::cout << a;
foo::B b;
std::cout << b;
}
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: