Re: [OMPI users] OSX undefined symbols when compiling hello world in cpp but not in c

Thu, 3 Apr 2008 22:05:11 -0400

Since HFS+ is not case sensitive, mpicc and mpiCC are the same file. So on OS X, you need to use mpic++ to compile C++ code. But it's worse than that, because the GNU compiler is smart enough to use the C+ + parser / compiler instead of the C one, so you don't see the error until link time. 

Long story short, try mpic++ instead of mpiCC and it should all work.

Brian

On Apr 3, 2008, at 8:00 PM, Jason Fleischer wrote:

On MacOS 10.5.2 standard installation with Open MPI 1.2.3 the
following hello world program in normal C compiles just fine and runs
correctly.

But if I rename the file to mpihello.cpp and I get many undefined
symbols at link time!

This error cropped up while I was working with a much more complex mpi
program, but it occurs even with this simplest of programs.  The error
also occurs if I change the hello world program to use the C++
function forms, such as MPI::Init() and MPI::COMM_WORLD.Get_rank().
Probably I'm just being embarrassingly stupid.

Thanks in advance.


mpihello.cpp:

#include <stdio.h>
#include <mpi.h>


int main ( int argc, char *argv[] )
{
  int rank, size;

  MPI_Init (&argc, &argv);
  MPI_Comm_rank (MPI_COMM_WORLD, &rank);
  MPI_Comm_size (MPI_COMM_WORLD, &size);
  printf( "Hello world from process %d of %d\n", rank, size );
  MPI_Finalize();
  return 0;
}

compiler output:

 mpiCC -o mpihello mpihello.cpp
Undefined symbols:
  "MPI::Datatype::Free()", referenced from:
      vtable for MPI::Datatypein ccQqJJlF.o
  "MPI::Win::Set_errhandler(MPI::Errhandler const&)", referenced from:
      vtable for MPI::Winin ccQqJJlF.o
  "___gxx_personality_v0", referenced from:
      ___gxx_personality_v0$non_lazy_ptr in ccQqJJlF.o
  "MPI::InitializeIntercepts()", referenced from:
      MPI::Real_init()     in ccQqJJlF.o
  "operator new[](unsigned long)", referenced from:
      MPI::Datatype::Get_contents(int, int, int, int*, int*,
MPI::Datatype*) constin ccQqJJlF.o
      MPI::Comm::Alltoallw(void const*, int const*, int const*,
MPI::Datatype const*, void*, int const*, int const*, MPI::Datatype
const*) constin ccQqJJlF.o
      MPI::Intracomm::Create_cart(int, int const*, bool const*, bool)
constin ccQqJJlF.o
      MPI::Intracomm::convert_info_to_mpi_info(int, MPI::Info
const*)in ccQqJJlF.o
      MPI::Cartcomm::Get_topo(int, int*, bool*, int*) constin
ccQqJJlF.o
      MPI::Cartcomm::Sub(bool const*)in ccQqJJlF.o
      MPI::Cartcomm::Map(int, int const*, bool const*) constin
ccQqJJlF.o
  "___cxa_pure_virtual", referenced from:
      vtable for MPI::Commin ccQqJJlF.o
  "operator new(unsigned long)", referenced from:
      MPI::Intracomm::Clone() constin ccQqJJlF.o
      MPI::Cartcomm::Clone() constin ccQqJJlF.o
      MPI::Graphcomm::Clone() constin ccQqJJlF.o
      MPI::Intercomm::Clone() constin ccQqJJlF.o
  "std::ios_base::Init::Init()", referenced from:
      __static_initialization_and_destruction_0(int, int)in ccQqJJlF.o
  "operator delete[](void*)", referenced from:
      MPI::Datatype::Get_contents(int, int, int, int*, int*,
MPI::Datatype*) constin ccQqJJlF.o
      MPI::Comm::Alltoallw(void const*, int const*, int const*,
MPI::Datatype const*, void*, int const*, int const*, MPI::Datatype
const*) constin ccQqJJlF.o
      MPI::Intracomm::Create_cart(int, int const*, bool const*, bool)
constin ccQqJJlF.o
      MPI::Intracomm::Spawn_multiple(int, char const**, char
const***, int const*, MPI::Info const*, int)in ccQqJJlF.o
      MPI::Intracomm::Spawn_multiple(int, char const**, char
const***, int const*, MPI::Info const*, int, int*)in ccQqJJlF.o
      MPI::Cartcomm::Get_topo(int, int*, bool*, int*) constin
ccQqJJlF.o
      MPI::Cartcomm::Sub(bool const*)in ccQqJJlF.o
      MPI::Cartcomm::Map(int, int const*, bool const*) constin
ccQqJJlF.o
  "std::ios_base::Init::~Init()", referenced from:
      ___tcf_0 in ccQqJJlF.o
  "_ompi_mpi_cxx_op_intercept", referenced from:
      _ompi_mpi_cxx_op_intercept$non_lazy_ptr in ccQqJJlF.o
  "MPI::Comm::Comm()", referenced from:
      MPI::Intracomm::Intracomm()in ccQqJJlF.o
      MPI::Intracomm::Intracomm(ompi_communicator_t*)in ccQqJJlF.o
  "vtable for __cxxabiv1::__si_class_type_info", referenced from:
      typeinfo for MPI::Prequestin ccQqJJlF.o
      typeinfo for MPI::Grequestin ccQqJJlF.o
      typeinfo for MPI::Commin ccQqJJlF.o
      typeinfo for MPI::Intracommin ccQqJJlF.o
      typeinfo for MPI::Cartcommin ccQqJJlF.o
      typeinfo for MPI::Graphcommin ccQqJJlF.o
      typeinfo for MPI::Intercommin ccQqJJlF.o
  "vtable for __cxxabiv1::__class_type_info", referenced from:
      typeinfo for MPI::Datatypein ccQqJJlF.o
      typeinfo for MPI::Opin ccQqJJlF.o
      typeinfo for MPI::Statusin ccQqJJlF.o
      typeinfo for MPI::Requestin ccQqJJlF.o
      typeinfo for MPI::Groupin ccQqJJlF.o
      typeinfo for MPI::Comm_Nullin ccQqJJlF.o
      typeinfo for MPI::Winin ccQqJJlF.o
      typeinfo for MPI::Errhandlerin ccQqJJlF.o
      typeinfo for MPI::Infoin ccQqJJlF.o
"MPI::Comm::Set_errhandler(MPI::Errhandler const&)", referenced from: 
      vtable for MPI::Commin ccQqJJlF.o
      vtable for MPI::Intracommin ccQqJJlF.o
      vtable for MPI::Cartcommin ccQqJJlF.o
      vtable for MPI::Graphcommin ccQqJJlF.o
      vtable for MPI::Intercommin ccQqJJlF.o
  "MPI::Win::Free()", referenced from:
      vtable for MPI::Winin ccQqJJlF.o
  "operator delete(void*)", referenced from:
      MPI::Datatype::~Datatype()in ccQqJJlF.o
      MPI::Datatype::~Datatype()in ccQqJJlF.o
      MPI::Status::~Status()in ccQqJJlF.o
      MPI::Status::~Status()in ccQqJJlF.o
      MPI::Request::~Request()in ccQqJJlF.o
      MPI::Request::~Request()in ccQqJJlF.o
      MPI::Request::~Request()in ccQqJJlF.o
      MPI::Prequest::~Prequest()in ccQqJJlF.o
      MPI::Prequest::~Prequest()in ccQqJJlF.o
      MPI::Grequest::~Grequest()in ccQqJJlF.o
      MPI::Grequest::~Grequest()in ccQqJJlF.o
      MPI::Group::~Group()in ccQqJJlF.o
      MPI::Group::~Group()in ccQqJJlF.o
      MPI::Comm_Null::~Comm_Null()in ccQqJJlF.o
      MPI::Comm_Null::~Comm_Null()in ccQqJJlF.o
      MPI::Comm_Null::~Comm_Null()in ccQqJJlF.o
      MPI::Win::~Win() in ccQqJJlF.o
      MPI::Win::~Win() in ccQqJJlF.o
      MPI::Errhandler::~Errhandler()in ccQqJJlF.o
      MPI::Errhandler::~Errhandler()in ccQqJJlF.o
      MPI::Comm::~Comm()in ccQqJJlF.o
      MPI::Comm::~Comm()in ccQqJJlF.o
      MPI::Comm::~Comm()in ccQqJJlF.o
      MPI::Intracomm::~Intracomm()in ccQqJJlF.o
      MPI::Intracomm::~Intracomm()in ccQqJJlF.o
      MPI::Intracomm::~Intracomm()in ccQqJJlF.o
      MPI::Info::~Info()in ccQqJJlF.o
      MPI::Info::~Info()in ccQqJJlF.o
      MPI::Intercomm::~Intercomm()in ccQqJJlF.o
      MPI::Intercomm::~Intercomm()in ccQqJJlF.o
      MPI::Intracomm::Clone() constin ccQqJJlF.o
      MPI::Cartcomm::~Cartcomm()in ccQqJJlF.o
      MPI::Cartcomm::~Cartcomm()in ccQqJJlF.o
      MPI::Graphcomm::~Graphcomm()in ccQqJJlF.o
      MPI::Graphcomm::~Graphcomm()in ccQqJJlF.o
      MPI::Cartcomm::Clone() constin ccQqJJlF.o
      MPI::Graphcomm::Clone() constin ccQqJJlF.o
      MPI::Op::~Op()  in ccQqJJlF.o
      MPI::Op::~Op()  in ccQqJJlF.o
  "MPI::FinalizeIntercepts()", referenced from:
      MPI::Finalize()     in ccQqJJlF.o
  "MPI::COMM_WORLD", referenced from:
      __ZN3MPI10COMM_WORLDE$non_lazy_ptr in ccQqJJlF.o
ld: symbol(s) not found
collect2: ld returned 1 exit status


--
  Brian Barrett
  Open MPI developer
  http://www.open-mpi.org/

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