Thanks Eric,
that makes sense now.
Durga,
since the MPI c++ bindings are not required, you might want to
mpicc ... -lstd++
instead of
mpicxx ...
Cheers,
Gilles
On Monday, March 21, 2016, Erik Schnetter <schnet...@gmail.com> wrote:
> According to the error message, "device.o" is the file that causes the
> error.
>
> According to the source code to which you point, this file is
> generated from a Cuda file, not from a C file. Cuda is close to C++,
> and apparently nvcc makes use of C++ features. Thus you need the C++
> run-time libraries.
>
> "*.o" files do not automatically pull in libraries, only shared
> libraries ("*.so") can do that.
>
> -erik
>
> On Sun, Mar 20, 2016 at 10:23 PM, Gilles Gouaillardet
> <gilles.gouaillar...@gmail.com <javascript:;>> wrote:
> > I am a bit puzzled...
> >
> > if only cuda uses the c++ std libraries, then it should depend on them
> > (ldd libcudaxyz.so can be used to confirm that)
> > and then linking with cuda lib should pull the c++ libs
> >
> > could there be a version issue ?
> > e.g. the missing symbol is not provided by the version of the c++ lib
> that
> > is pulled.
> > that might occur if you are using cuda built for distro X on distro Y
> >
> > could you please double check this ?
> > if everything should work, then i recommend you report this to nvidia
> >
> > Cheers,
> >
> > Gilles
> >
> > On Monday, March 21, 2016, Damien Hocking <dam...@0x544745.com
> <javascript:;>> wrote:
> >>
> >> Durga,
> >>
> >> The Cuda libraries use the C++ std libraries. That's the std::ios_base
> >> errors.. You need the C++ linker to bring those in.
> >>
> >> Damien
> >>
> >> On March 20, 2016 9:15:47 AM "dpchoudh ." <dpcho...@gmail.com
> <javascript:;>> wrote:
> >>>
> >>> Hello all
> >>>
> >>> I downloaded some code samples from here:
> >>>
> >>> https://github.com/parallel-forall/code-samples/
> >>>
> >>> and tried to build the subdirectory
> >>>
> >>> posts/cuda-aware-mpi-example/src
> >>>
> >>> in my CentOS 7 machine.
> >>>
> >>> I had to make several changes to the Makefile before it would build.
> The
> >>> modified Makefile is attached (the make targets I am talking about are
> the
> >>> 3rd and 4th from the bottom). Most of the modifications can be
> explained as
> >>> possible platform specific variations (such as path differences betwen
> >>> Ubuntu and CentOS), except the following:
> >>>
> >>> I had to use a C++ linker (mpic++) to link in the object files that
> were
> >>> produced with C host compiler (mpicc) and CUDA compiler (nvcc). If I
> did not
> >>> do this, (i.e. I stuck to mpicc for linking), I got the following link
> >>> error:
> >>>
> >>> mpicc -L/usr/local/cuda/lib64 -lcudart -lm -o
> >>> ../bin/jacobi_cuda_normal_mpi jacobi.o input.o host.o device.o
> >>> cuda_normal_mpi.o
> >>> device.o: In function `__static_initialization_and_destruction_0(int,
> >>> int)':
> >>> tmpxft_00004651_00000000-4_Device.cudafe1.cpp:(.text+0xd1e): undefined
> >>> reference to `std::ios_base::Init::Init()'
> >>> tmpxft_00004651_00000000-4_Device.cudafe1.cpp:(.text+0xd2d): undefined
> >>> reference to `std::ios_base::Init::~Init()'
> >>> collect2: error: ld returned 1 exit status
> >>>
> >>> Can someone please explain why would I need a C++ linker for object
> files
> >>> that were generated using C compiler? Note that if I use mpic++ both
> for
> >>> compiling and linking, there are no errors either.
> >>>
> >>> Thanks in advance
> >>> Durga
> >>>
> >>> Life is complex. It has real and imaginary parts.
> >>> _______________________________________________
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> >>> http://www.open-mpi.org/community/lists/users/2016/03/28760.php
> >
> >
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>
>
>
> --
> Erik Schnetter <schnet...@gmail.com <javascript:;>>
> http://www.perimeterinstitute.ca/personal/eschnetter/
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