[Bug target/59516] New: [4.9 Regression] Multiple definition of `X' / of `non-virtual thunk to X' errors with LTO

[d.g.gorbachev at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59516

            Bug ID: 59516
           Summary: [4.9 Regression] Multiple definition of `X' / of
                    `non-virtual thunk to X' errors with LTO
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: d.g.gorbachev at gmail dot com
            Target: i686-w64-mingw32

Created attachment 31442
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31442&action=edit
Testcase (compile with `-O2 -flto -shared')

GCC 4.9.0 20131208 (experimental).

/tmp/ccwAdNny.o (symbol from
plugin):(.gnu.linkonce.t._ZN1S2fnEv[__ZThn8_N1S2fnEv]+0x0): multiple definition
of `S::fn()'
/tmp/ccwhiDw7.o (symbol from
plugin):(.gnu.linkonce.t._ZN1S2fnEv[__ZThn4_N1S2fnEv]+0x0): first defined here
/tmp/ccwAdNny.o (symbol from
plugin):(.gnu.linkonce.t._ZN1S2fnEv[__ZThn8_N1S2fnEv]+0x0): multiple definition
of `non-virtual thunk to S::fn()'
/tmp/ccwhiDw7.o (symbol from
plugin):(.gnu.linkonce.t._ZN1S2fnEv[__ZThn4_N1S2fnEv]+0x0): first defined here
/tmp/ccwAdNny.o (symbol from
plugin):(.gnu.linkonce.t._ZN1S2fnEv[__ZThn8_N1S2fnEv]+0x0): multiple definition
of `non-virtual thunk to S::fn()'
/tmp/ccwhiDw7.o (symbol from
plugin):(.gnu.linkonce.t._ZN1S2fnEv[__ZThn4_N1S2fnEv]+0x0): first defined here
collect2: error: ld returned 1 exit status