[Bug c++/53711] New: Wunused-function should warn for functions in the unnamed namespace

[Bug c++/53711] New: Wunused-function should warn for functions in the unnamed namespace

[david at doublewise dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53711

             Bug #: 53711
           Summary: Wunused-function should warn for functions in the
                    unnamed namespace
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: david@doublewise.net


Wunused-function currently only warns for functions that are declared as static
that are never used / defined. It should also warn about functions placed in
the unnamed namespace, such as:

namespace {
void f();
}

Such functions have similar mechanics to static functions. In particular, they
can only be referenced in the translation unit, so the compiler knows for
certain that if the function is not used in this translation unit, it is not
used.

[Bug c++/53711] Wunused-function should warn for functions in the unnamed namespace

[daniel.kruegler at googlemail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53711

Daniel Krügler <daniel.kruegler at googlemail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daniel.kruegler at
                   |                            |googlemail dot com

--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2012-06-20 18:46:53 UTC ---
I agree. For C++11 code there exists one further similarity, namely that f()
has static linkage like a function explicitly declared static in namespace
scope.

[Bug c++/53711] Wunused-function should warn for functions in the unnamed namespace

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53711

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Mar 14 15:20:28 2014
New Revision: 208569

URL: http://gcc.gnu.org/viewcvs?rev=208569&root=gcc&view=rev
Log:
    PR c++/53711
    * d++.dg/warn/anonymous-namespace-6.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/warn/anonymous-namespace-6.C

[Bug c++/53711] Wunused-function should warn for functions in the unnamed namespace

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53711

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |4.9.0

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed then.