Thank Brian. Now the compiling is successful!
Guiyuan
On 3/31/06, Brian Barrett <brbarret_at_[hidden]> wrote:
>
> On Mar 31, 2006, at 10:36 AM, Guiyuan Lei wrote:
>
> > I have one program which was written in c++, it also uses public
> > software package including lapack, blas and blitz++. I have
> > compiled the code and run the program successfully by mpich. The
> > compiling command is as following:
> >
> > g++ -c gibbsreg.cpp -I/usr/lib/mpich/include
> > mpif77 -lstdc++ gibbsreg.o -lblas -llapack -lg2c -lm
> >
> > But when I tried to compile this code by using lam/mpi (on another
> > machine, which has both lam/mpi and mpich installed), it failed.
> > g++ -c gibbsreg.cpp -I/usr/lib/lam/include
> >
> > mpif77 -lstdc++ gibbsreg.o -lblas -llapack -lg2c -lm
> >
> > The compling comes with the following error. Anybody has any idea
> > about this lam/mpi problem? Why it successed with mpich, but failed
> > with lam/mpi? I guess it is because the mixture using of Fortran
> > and c++ in the code. Many thanks in advance.
> >
> > gibbsreg.o(.gnu.linkonce.r._ZTVN3MPI2OpE+0x10): undefined reference
> > to `MPI::Op::Init(void (*)(void const*, void*, int, MPI::Datatype
> > const&), bool)'
> It looks like we don't include the library containing the C++
> interface when linking with the Fortran compiler (which is only
> slightly strange because we *do* include the Fortran interface
> library when linking with the C++ compiler). Anyway, all the symbols
> that the linker complained about are in the library that contains the
> C++ interface, which is called liblammpi++. I think if you make your
> link line:
>
> mpif77 -llammpi++ -lstdc++ gibbsreg.o -lblas -llapack -lg2c -lm
>
> everything should work just fine. I can't see any reason not to add
> the C++ interface library to the list of libraries with the mpif77
> wrapper (which is probably what MPICH does), so I'll add that to our
> to-do list.
>
> Hope this helps,
>
> Brian
>
>
> --
> Brian Barrett
> LAM/MPI developer and all around nice guy
> Have a LAM/MPI day: http://www.lam-mpi.org/
>
>
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