I wish it were that easy. When I go that route, I get error messages like the following when trying to compile the parallel code with Intel:
libmpi.so: undefined reference to `__intel_sse2_strcpy'
and other messages for every single Intel-implemented standard C-function.
-david
--
David Gunter
HPC-3: Infrastructure Team
Los Alamos National Laboratory
On Mar 20, 2012, at 8:18 AM, Barrett, Brian W wrote:
> On 3/20/12 10:06 AM, "Gunter, David O" <dog_at_[hidden]> wrote:
>
>> I need to build ompi-1.4.3 (or the newer 1.4.5) with an older Intel 10.0
>> compiler, but on a newer system in which the default g++ headers are
>> incompatible with Intel. Thus the C and Fortran compilers function
>> normally but the Intel C++ compiler fails to build even a simple "hello
>> world" code.
>>
>> Is there a way to build OMPI without a C++ compiler? I tried using the
>> --disable-mpi-cxx and --disable-mpi-cxx-seek flags but these are just for
>> the resulting bindings. The configure step still continues to search for
>> a working C++ compiler.
>>
>> Yes, I know I can upgrade the Intel compiler but we don't have that as an
>> option in this case.
>
> Unfortunately, you're a bit out of luck. Open MPI 1.4.x requires C++ even
> if you're not building the C++ bindings. This is not true of 1.5.x and
> later.
>
> If you don't need the C++ bindings, I would build Open MPI with GNU C and
> C++ and Intel Fortran. After building, edit
> <PREFIX>/share/openmpi/mpicc-wrapper-data.txt to change the compiler=gcc
> line to compiler=<intel C compiler>. There's not going to be much
> performance difference between the two compilers for Open MPI itself. GNU
> C and Intel C are link compatible, so that should work out for you and the
> users will never be the wiser.
>
> Brian
>
> --
> Brian W. Barrett
> Dept. 1423: Scalable System Software
> Sandia National Laboratories
>
>
>
>
>
>
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