[Bug c++/58045] gcc 4.8 produces an undefined reference to an inline function

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58045

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-09-09
     Ever confirmed|0                           |1

--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
This is different from the other PR.

Here C++ FE declare the function as:

_ZNK4llvm14raw_fd_ostream11current_posEv/6 (virtual uint64_t
llvm::raw_fd_ostream::current_pos() const) @0x7ffff7047980
  Type: function definition analyzed
  Visibility: external public weak comdat
comdat_group:_ZNK4llvm14raw_fd_ostream11current_posEv one_only virtual
  References: __gcov0._ZNK4llvm14raw_fd_ostream11current_posEv/78
(read)__gcov0._ZNK4llvm14raw_fd_ostream11current_posEv/78 (write)
  Referring:
  Availability: available
  Profile id: 1497168468
  Function flags: body
  Called by:
_ZL16writeStringTableRN4llvm14raw_fd_ostreamENS_8ArrayRefIN12_GLOBAL__N_118NewArchiveIteratorEEERSt6vectorIjSaIjEE.isra.8.constprop.12/90
(1.47 per call) (can throw external)

The meaning of external comdat does not make that much sense to me but I can
definitely make can_refer_decl_in_current_unit_p to declare the function
non-referable. That would untimately prevent inlining while it is certainly
possible, since body is around.

Jason, why the function is external and isn't there way to simply make it
comdat?