[Bug lto/46948] New: [4.6 Regression] Undefined reference errors, LTO, and visibility

[Bug lto/46948] New: [4.6 Regression] Undefined reference errors, LTO, and visibility

[d.g.gorbachev at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46948

           Summary: [4.6 Regression] Undefined reference errors, LTO, and
                    visibility
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: d.g.gorbachev@gmail.com


Created attachment 22757
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22757
Testcase

[Bug lto/46948] [4.6 Regression] Undefined reference errors, LTO, and visibility

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46948

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.6.0

[Bug lto/46948] [4.6 Regression] Undefined reference errors, LTO, and visibility

[d.g.gorbachev at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46948

--- Comment #1 from Dmitry Gorbachev <d.g.gorbachev at gmail dot com> 2011-01-09 17:19:54 UTC ---
GCC 4.6.0 20110108 no longer fails with `-fuse-linker-plugin'. Still fails with
`-fno-use-linker-plugin'.

[Bug lto/46948] [4.6 Regression] Undefined reference errors, LTO, and visibility

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46948

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |hubicka at gcc dot gnu.org
         Resolution|                            |INVALID

--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> 2011-01-26 14:49:02 UTC ---
This is documented feature.
See "Hidden symbols used from non-link time objects now have to be explicitly
annotated with externally_visible when the linker plugin is not used." at
changes.html

W/o handling hidden visibility the "optimistic" way, we would need extra
attributes to make LTO effective w/o plugin on shared libs (since
-fwhole-program + externally_visible flag is not too handy there given that
most programs was decorated the other way arround with hidden visibilities).