[Bug c++/38547] New: duplicate symbols with g++

[Bug c++/38547] New: duplicate symbols with g++

[tammer at tammer dot net]

Hello,
I get the following duplicate symbols with g++ on AIX.

g++ (GCC) 4.2.4

g++ hello.cpp -o hello (hello.cpp is just a cout hello world...)

ld: 0711-224 WARNING: Duplicate symbol: .__divdi3
ld: 0711-224 WARNING: Duplicate symbol: .__moddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivdi3
ld: 0711-224 WARNING: Duplicate symbol: .__umoddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivmoddi4
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.

I will upload a log with a more detailed error description.

Bye
  Rainer Tammer


-- 
           Summary: duplicate symbols with g++
           Product: gcc
           Version: 4.2.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tammer at tammer dot net
 GCC build triplet: powerpc-ibm-aix5.3.0.0
  GCC host triplet: powerpc-ibm-aix5.3.0.0
GCC target triplet: powerpc-ibm-aix5.3.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug c++/38547] duplicate symbols with g++

[tammer at tammer dot net]

------- Comment #1 from tammer at tammer dot net  2008-12-17 07:29 -------
Created an attachment (id=16914)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16914&action=view)
build log of sample


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2008-12-21 23:00 -------

 .__divdi3                
{/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/libgcc_s.a[shr.o]}
    ** Duplicate **       
../../gcc-4.2.4/gcc/libgcc2.c(/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/libgcc.a[_divdi3.o])

libgcc.a and libgcc_s.a should not be linked in together.


Can you add a -v to the gcc command line and provide that output?  


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #3 from tammer at tammer dot net  2008-12-22 07:22 -------
Hello,
here is the -v log:
Using built-in specs.
Target: powerpc-ibm-aix5.3.0.0
Configured with: ../gcc-4.2.4/configure --with-as=/usr/bin/as
--with-ld=/usr/bin/ld --enable-languages=c,c++,fortran --prefix=/opt/freeware
--enable-threads --enable-version-specific-runtime-libs --disable-nls
--enable-decimal-float=dpd --host=powerpc-ibm-aix5.3.0.0
Thread model: aix
gcc version 4.2.4
 /opt/freeware/libexec/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/cc1plus -quiet -v
-D_ALL_SOURCE hello.cpp -quiet -dumpbase hello.cpp -auxbase hello -version -o
/tmp//ccyHZAZn.s
ignoring nonexistent directory
"/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/../../../../powerpc-ibm-aix5.3.0.0/include"
#include "..." search starts here:
#include <...> search starts here:
 /opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/include/c++

/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/include/c++/powerpc-ibm-aix5.3.0.0
 /opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/include/c++/backward
 /usr/local/include
 /opt/freeware/include
 /opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/include
 /usr/include
End of search list.
GNU C++ version 4.2.4 (powerpc-ibm-aix5.3.0.0)
        compiled by GNU C version 4.2.4.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=32768
Compiler executable checksum: aad024cebe4ac3095c87c9dcfa7fc033
 /usr/bin/as -u -mppc -o /tmp//ccQD9A51.o /tmp//ccyHZAZn.s
 /opt/freeware/libexec/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/collect2
-bpT:0x10000000 -bpD:0x20000000 -btextro -bnodelcsect -o hello /lib/crt0.o
-L/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4
-L/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/../../.. /tmp//ccQD9A51.o
-lstdc++ -lm -lgcc_s
/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/libgcc.a -lc -lgcc_s
/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/libgcc.a
ld: 0711-224 WARNING: Duplicate symbol: .__divdi3
ld: 0711-224 WARNING: Duplicate symbol: .__moddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivdi3
ld: 0711-224 WARNING: Duplicate symbol: .__umoddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivmoddi4
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.

Bye
  Rainer


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #6 from tammer at tammer dot net  2008-12-22 07:28 -------
Hello,
I have uploaded the dump of ligbcc.a and libgcc_s.a.
Bye
  Rainer


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #4 from tammer at tammer dot net  2008-12-22 07:27 -------
Created an attachment (id=16957)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16957&action=view)
libgcc dump


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #5 from tammer at tammer dot net  2008-12-22 07:27 -------
Created an attachment (id=16958)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16958&action=view)
libgcc_s dump


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[pinskia at gcc dot gnu dot org]

------- Comment #7 from pinskia at gcc dot gnu dot org  2008-12-22 07:46 -------
-lgcc_s
/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/libgcc.a

That should not happen.  In fact I am reading init_gcc_specs correctly, you
have a modified GCC version.

Did you compile this GCC yourself or is this from a binary install of GCC?

I do know that other folks trying to use gcc with C++ on aix5.3 works.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #8 from tammer at tammer dot net  2008-12-22 07:56 -------
Hello,
this happened with all 4.x gcc versions. This version is from www.perzl.org.
There is only a tiny patch to the build files (see attachment).

Bye
  Rainer


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #10 from tammer at tammer dot net  2008-12-22 07:57 -------
Created an attachment (id=16960)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16960&action=view)
AIX gcc 4.2.4 spec file


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #9 from tammer at tammer dot net  2008-12-22 07:56 -------
Created an attachment (id=16959)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16959&action=view)
AIX gcc 4.2.4 patch


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #11 from tammer at tammer dot net  2008-12-22 08:03 -------
Hello,
one clarification 
... this happened with all 4.x gcc versions ...

This means I have tried to build gcc 4.x myself and I ran in the same problem
that the symbols come from two libraries. One library provides the static
version and one the dynamic. I think that this functions should be pulled in
via the static version... am I wrong here ? Unfortunately I have no deeper
knowledge of the gcc build environment so its really hard to track down the
problem. Thanks for your help.

Bye
  Rainer


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[pinskia at gcc dot gnu dot org]

------- Comment #12 from pinskia at gcc dot gnu dot org  2008-12-22 08:11 -------
Actually those symbols in libgcc_s.a should be hidden ...


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[pinskia at gcc dot gnu dot org]

------- Comment #13 from pinskia at gcc dot gnu dot org  2008-12-22 08:17 -------
Oh, you should read the installation instructions:
http://gcc.gnu.org/install/specific.html 

Linking executables and shared libraries may produce warnings of duplicate
symbols. The assembly files generated by GCC for AIX always have included
multiple symbol definitions for certain global variable and function
declarations in the original program. The warnings should not prevent the
linker from producing a correct library or runnable executable.


-- 

pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #14 from tammer at tammer dot net  2008-12-22 09:48 -------
Hello,
yes, the binary executes. 
So these symbols should be removed from the export file from ligbcc_s.a then?

I will build gcc 4.2.4 on my build machine (AIX 5.3) with the SPEC file/patch
from Mr. Perzl. Then I will look for the export file of libgcc_s.a.

Bye
  Rainer


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #16 from tammer at tammer dot net  2008-12-22 12:17 -------
Created an attachment (id=16962)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16962&action=view)
errors during build


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #15 from tammer at tammer dot net  2008-12-22 12:16 -------
Hello,
I just started my own build of 4.2.4 ...
During stage3 I get the following errors:


ld: 0711-768 WARNING: Object
../libsupc++/.libs/libsupc++convenience.a[eh_terminate.o], section 1, function
.__cxxabiv1::__terminate(void (*)()):
        The branch at address 0x13c is not followed by a recognized no-op
        or TOC-reload instruction. The unrecognized instruction is 0x0.
ld: 0711-768 WARNING: Object
../libsupc++/.libs/libsupc++convenience.a[eh_terminate.o], section 1, function
.std::terminate():
        The branch at address 0x194 is not followed by a recognized no-op
        or TOC-reload instruction. The unrecognized instruction is 0x0.

see attached log...


Bye
  Rainer


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #17 from tammer at tammer dot net  2008-12-22 12:31 -------
Hello,
I found one interesting thing:

The call (for .libs/libstdc++.so.6) which produced the error messaged ends in:
  ${wl}-berok
Should this not be:
  -Wl,-berok
Bye
 Rainer


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[bruprz1 at lhsystems dot pl]

------- Comment #18 from bruprz1 at lhsystems dot pl  2009-01-21 14:39 -------
(In reply to comment #13)
> symbols. The assembly files generated by GCC for AIX always have included
> multiple symbol definitions for certain global variable and function

If I understand correctly, that statement means that there have always been
duplicate symbols under AIX. This may be true for 5.3, but:

We maintain an application in C/C++ (over 1.5 million ELOC, with shared
libraries) and since we had upgraded to AIX 5.2 and GCC4.1.1 we didn't have
even one duplicate symbol there. Before that we indeed had duplicate symbols in
C++ code (since weak symbols were not supported). Please have a look at the
following:

host52:/tmp$ oslevel -r
5200-00
host52:/tmp$ /usr/local/gcc/3.4.3/bin/g++ a.cc
host52:/tmp$ /usr/local/gcc/4.1.1/bin/g++ a.cc


host53:/tmp$ oslevel -r
5300-02
host53:/tmp$ /usr/local/gcc/4.0.2/bin/g++ a.cc
ld: 0711-224 WARNING: Duplicate symbol: .__divdi3
ld: 0711-224 WARNING: Duplicate symbol: .__moddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivdi3
ld: 0711-224 WARNING: Duplicate symbol: .__umoddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivmoddi4
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.
host53:/tmp$ /usr/local/gcc/4.3.2/bin/g++ a.cc
ld: 0711-224 WARNING: Duplicate symbol: .__divdi3
ld: 0711-224 WARNING: Duplicate symbol: .__moddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivdi3
ld: 0711-224 WARNING: Duplicate symbol: .__umoddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivmoddi4
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.

It looks like a 5.3 regression - could you have look at the problem again,
please?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547

[Bug target/38547] duplicate symbols with g++ on AIX

[tammer at tammer dot net]

------- Comment #19 from tammer at tammer dot net  2009-01-25 09:18 -------
Hello,
I second that.
Bye
  Rainer


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38547