[Llvm-bgq-discuss] Linker error: undefined reference to `vtable for std::nested_exception'

[Hal Finkel]

Hi,

This error almost always occurs when you pick up the old libstdc++ library instead of the one from the 4.7.2 toolchain. I'll look at your verbose logs later.

 -Hal

----- Original Message -----
> From: "Sandipan Mohanty" <s.mohanty at fz-juelich.de>
> To: llvm-bgq-discuss at lists.alcf.anl.gov
> Sent: Thursday, July 17, 2014 11:53:07 AM
> Subject: Re: [Llvm-bgq-discuss] Linker error: undefined reference to `vtable	for std::nested_exception'
> 
> Hi!
> 
>     The linker error Michael mentioned also appears for a simple
>     hello world
> program:
> 
> #include <iostream>
> 
> int main()
> {
>     std::cout << "Hello, World!\n";
> }
> 
> Compiling it with bgclang++ is fine. Compiling with bgclang++11,
> which also
> links with libc++, produces the linker error he mentioned about
> nested_exception. The nested_exception class members are defined
> inside the
> exception.cpp file in the libc++ source. But there are lots of macros
> influencing what sections get compiled. Is the libc++ in the RPM
> compiled with
> libsupc++, libcxxrt or libcxxabi as the LIBCXX_CXX_ABI ?
> 
> /Sandipan
> 
> 
> 
> On Thursday 17 Jul 2014 11:30:35 Rob Latham wrote:
> > See http://www.alcf.anl.gov/user-guides/bgclang-compiler#faq, which
> > I
> > myself was just staring at last night:
> > 
> > Linking code compiled with bgclang++ together with code compiled
> > with
> > bgclang++11 does not work, why?
> > 
> > Code compiled using bgclang++ uses the same libstdc++ standard
> > template
> > library (STL) implementation as the system-default GNU
> > powerpc64-bgq-linux-g++ compiler. This provides compatibility with
> > C++
> > libraries, including some system libraries, compiled with the GNU
> > toolchain. This STL implementation, however, cannot provide a
> > conforming
> > C++11 programming environment, and so bgclang++11 uses an
> > up-to-date STL
> > implementation derived from LLVM's libc++. Unfortunately, this STL
> > implementation is incompatible with libstdc++, and so linking
> > errors
> > will result for functions that use STL objects as part of their
> > signatures (i.e. parameter or return types).
> > 
> > ==rob
> > 
> > On 07/17/2014 08:48 AM, Michael Schlottke wrote:
> > > Hi Hal,
> > > 
> > > We tried to install the new version of clang on the BG/Q @ FZ
> > > Juelich
> > > from your rpms, which worked like a breeze (thanks again for your
> > > effors!). However, with the new installation we are not able to
> > > link
> > > even simple problems against libcxx, as all attempts end with the
> > > following error:
> > > 
> > > /bgsys/local/clang/r209570-20140527/libc++/lib/libc++.a(exception.cpp.o):(
> > > .toc+0x0): undefined reference to `vtable for
> > > std::nested_exception'
> > > clang: error: linker command failed with exit code 1 (use -v to
> > > see
> > > invocation)
> > > 
> > > It happens as soon as we try to compile & link a dummy program
> > > that has
> > > at least one std library include file. If we use bgclang++, the
> > > error
> > > does not occur, but it does when using either -stdlib=libc++ or
> > > bgclang++11.
> > > 
> > > Do you have any idea what the source of the problem could be? I
> > > attached
> > > a MWE and the output of running bgclang++11 with -v.
> > > 
> > > Regards,
> > > 
> > > Michael
> > > 
> > > P.S.: We had a driver/toolchain upgrade on JUQUEEN and thus our
> > > old
> > > clang installations are not working anymore. Maybe this could be
> > > related
> > > to the problem?
> > > 
> > > 
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-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory