[Bug c++/27408] New: g++ -force_flat_namespace fails due to crt3.o multiply defined symbols

[Bug c++/27408] New: g++ -force_flat_namespace fails due to crt3.o multiply defined symbols

[peter at pogma dot com]

03-May-2006 12:37 PM Peter O'Gorman:
g++ -force_flat_namespace dies with multiple definition of symbols in libSystem
and crt3.o on Mac OS X 10.4.

peter$ /opt/gcc_mainline/bin/g++ -force_flat_namespace -o foo foo.cpp
/opt/odcctools/bin/ld: multiple definitions of symbol _atexit
/opt/gcc_mainline/lib/gcc/powerpc-apple-darwin8.6.0/4.2.0/crt3.o private
external definition of _atexit in section (__TEXT,__text)
/usr/lib/libSystem.dylib(atexit.So) definition of _atexit
/opt/odcctools/bin/ld: multiple definitions of symbol ___cxa_atexit
/opt/gcc_mainline/lib/gcc/powerpc-apple-darwin8.6.0/4.2.0/crt3.o private
external definition of ___cxa_atexit in section (__TEXT,__text)
/usr/lib/libSystem.dylib(atexit.So) definition of ___cxa_atexit
collect2: ld returned 1 exit status

I expected the link to succeed. This bug is also an Apple radar -
rdar://problem/4535166

Peter


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           Summary: g++ -force_flat_namespace fails due to crt3.o multiply
                    defined symbols
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: peter at pogma dot com
  GCC host triplet: *-*-darwin8*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27408

[Bug target/27408] [4.2 Regression] g++ -force_flat_namespace fails due to crt3.o multiply defined symbols

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |geoffk at gcc dot gnu dot
                   |                            |org
           Severity|normal                      |major
          Component|c++                         |target
   GCC host triplet|*-*-darwin8*                |
 GCC target triplet|                            |*-*-darwin8*
            Summary|g++ -force_flat_namespace   |[4.2 Regression] g++ -
                   |fails due to crt3.o multiply|force_flat_namespace fails
                   |defined symbols             |due to crt3.o multiply
                   |                            |defined symbols
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27408

[Bug target/27408] [4.2 Regression] g++ -force_flat_namespace fails due to crt3.o multiply defined symbols

[geoffk at gcc dot gnu dot org]

------- Comment #1 from geoffk at gcc dot gnu dot org  2006-05-03 17:12 -------
If fixed, this will be fixed in the Darwin linker.  In the meantime, don't use
-force_flat_namespace.  In fact, it's probably better if you don't use it at
all; the system libraries aren't expecting it and this is just one of many
possible problems.


-- 

geoffk at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27408

[Bug target/27408] [4.2 Regression] g++ -force_flat_namespace fails due to crt3.o multiply defined symbols

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-05-03 23:34 -------
Can we then have a new cctools which includes a newer ld64 also since right now
powerpc-darwin is broken on a G5 without using --disable-multilib.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27408

[Bug target/27408] [4.2 Regression] g++ -force_flat_namespace fails due to crt3.o multiply defined symbols

[geoffk at gcc dot gnu dot org]

------- Comment #3 from geoffk at gcc dot gnu dot org  2006-05-23 21:21 -------
(In reply to comment #2)
> Can we then have a new cctools which includes a newer ld64 also since right now
> powerpc-darwin is broken on a G5 without using --disable-multilib.

This specific problem should be resolved with Xcode 2.3, just released. 
However -force_flat_namespace still doesn't work.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27408