R help - May 2006 - switching compilers with R CMD SHLIB

Hi,

I am having trouble compiling some parallelised c++ code using R CMD 
SHLIB because I cannot seem to specify which compiler is used.  The 
default uses g++ and I would like to use mpicxx distributed with 
MPICH-2.  Is this possible?

Thanks for any help,

Jarrod.

On Sun, 21 May 2006, Jarrod Hadfield wrote:
> Hi,
>
> I am having trouble compiling some parallelised c++ code using R CMD
> SHLIB because I cannot seem to specify which compiler is used.  The
> default uses g++ and I would like to use mpicxx distributed with
> MPICH-2.  Is this possible?
Yes, and ?SHLIB points you to the documentation of how to do so.
What about that did you not understand?  E.g.

MAKEFLAGS="CC=mpicxx" R CMD SHLIB *.c

should work, amongst other ways.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

Hi,

Thanks for the help.  If anyone is interested mpi/c++ code can be 
compiled as a shared library using:

MAKEFLAGS="CXX=mpicxx CXXFLAGS=-DMPICH_IGNORE_CXX_SEEK 
SHLIB_CXXLD=mpicxx" R CMD SHLIB ?.cc -o ?.so

However, I would like to execute the C code using mpiexec (otherwise 
only a single processor is seen).  I can not find any documentation on 
this, but was wondering whether this too is possible.

Thanks,

Jarrod.


Prof Brian Ripley wrote:
> On Sun, 21 May 2006, Jarrod Hadfield wrote:
>
>> Hi,
>>
>> I am having trouble compiling some parallelised c++ code using R CMD
>> SHLIB because I cannot seem to specify which compiler is used.  The
>> default uses g++ and I would like to use mpicxx distributed with
>> MPICH-2.  Is this possible?
>
>
> Yes, and ?SHLIB points you to the documentation of how to do so.
> What about that did you not understand?  E.g.
>
> MAKEFLAGS="CC=mpicxx" R CMD SHLIB *.c
>
> should work, amongst other ways.
>

-- 
Department of Animal and Plant Sciences,
University of Sheffield,
Sheffield,
S10 2TN, UK.
Tel  (+44) (0)114 222 0112
Fax (+44) (0)114 222 0002