[Bug c++/42101] New: Linking failure with static constants and ternary inline function

[Bug c++/42101] New: Linking failure with static constants and ternary inline function

[dvander at alliedmods dot net]

When using private, static constants in a class declaration, and using these
constants in an inline function that returns a ternary expression , gcc
produces linker errors.

This seems to be a problem going back to at least 4.0, and I can reproduce it
against 4.4.1. I have not tried anything earlier than 4.0 or later than 4.4.1.


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           Summary: Linking failure with static constants and ternary inline
                    function
           Product: gcc
           Version: 4.4.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dvander at alliedmods dot net
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[dvander at alliedmods dot net]

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------- Comment #1 from dvander at alliedmods dot net  2009-11-19 01:44 -------
Created an attachment (id=19039)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19039&action=view)
reduced test case

This program doesn't link, though it should.

keima:src dvander$ g++ test.cpp -o test
test.cpp: In function ‘int main()’:
test.cpp:28: warning: format ‘%d’ expects type ‘int’, but argument 2 has type
‘size_t’
Undefined symbols:
  "X::LENGTH_MASK", referenced from:
      X::dependentLength() const in ccdhJ0JB.o
  "X::DEPENDENT_LENGTH_MASK", referenced from:
      X::dependentLength() const in ccdhJ0JB.o
ld: symbol(s) not found
collect2: ld returned 1 exit status


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2009-11-19 01:46 -------
You don't have a definition of the static const variable which you need for
this to be valid C++.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[andhow at gmail dot com]

------- Comment #3 from andhow at gmail dot com  2009-11-19 01:52 -------
(In reply to comment #2)
> You don't have a definition of the static const variable which you need for
> this to be valid C++.


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andhow at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |andhow at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[andhow at gmail dot com]

------- Comment #4 from andhow at gmail dot com  2009-11-19 01:53 -------
(In reply to comment #3)
> (In reply to comment #2)
> > You don't have a definition of the static const variable which you need for
> > this to be valid C++.

Heh, oops, hit 'Commit' accidentally.

This example does have a definition for the static member variable.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[dvander at alliedmods dot net]

------- Comment #5 from dvander at alliedmods dot net  2009-11-19 01:58 -------
I'll also note that the compiler seems to accept it, as I get a .o file. The
linking step botches.


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dvander at alliedmods dot net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[paolo dot carlini at oracle dot com]

------- Comment #6 from paolo dot carlini at oracle dot com  2009-11-19 02:16 -------
It doesn't have any definition, it does have a *declaration*. This is pretty
basic C++, by the way. Just add out of class:

  const size_t X::DEPENDENT_LENGTH_MASK;
  ...
  ...

and everything will be fine. The compiler doesn't diagnose that, right, because
the actual diagnosis, as for any undefined entity, eg, functions, happens only
at link time, the linker tells you: as happens for functions, you could well
have the definitions in another file.


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paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[andhow at gmail dot com]

------- Comment #7 from andhow at gmail dot com  2009-11-19 02:41 -------
(In reply to comment #6)

> This is pretty basic C++, by the way.

Mmm hmm. SO basic that it warranted special clarification in 9.4.2-4:

"The member shall still be defined in a namespace scope if it is used in the
program and the namespace scope definition shall not contain an initializer."


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[paolo dot carlini at oracle dot com]

------- Comment #8 from paolo dot carlini at oracle dot com  2009-11-19 09:38 -------
It is basic, yes, a point worth making with people insisting that we do have a
serious bug, thus reopening the PR at will, without trusting the competence of
the maintainers and wasting some of our time.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[pinskia at gcc dot gnu dot org]

------- Comment #9 from pinskia at gcc dot gnu dot org  2009-12-01 17:07 -------
*** Bug 42241 has been marked as a duplicate of this bug. ***


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |halterman at southern dot
                   |                            |edu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[paolo dot carlini at oracle dot com]

------- Comment #10 from paolo dot carlini at oracle dot com  2009-12-08 09:18 -------
*** Bug 42330 has been marked as a duplicate of this bug. ***


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paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aijunbai at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[redi at gcc dot gnu dot org]

------- Comment #11 from redi at gcc dot gnu dot org  2009-12-08 09:48 -------
*** Bug 42330 has been marked as a duplicate of this bug. ***


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[pinskia at gcc dot gnu dot org]

------- Comment #12 from pinskia at gcc dot gnu dot org  2010-03-31 00:14 -------
*** Bug 43594 has been marked as a duplicate of this bug. ***


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rwgk at yahoo dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[pinskia at gcc dot gnu dot org]

------- Comment #13 from pinskia at gcc dot gnu dot org  2010-05-20 17:53 -------
*** Bug 44215 has been marked as a duplicate of this bug. ***


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |doreille at smr dot ch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101

[Bug c++/42101] Linking failure with static constants and ternary inline function

[paolo dot carlini at oracle dot com]

------- Comment #14 from paolo dot carlini at oracle dot com  2010-06-13 17:53 -------
*** Bug 44528 has been marked as a duplicate of this bug. ***


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paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gcc at razorcam dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42101