[R] switching compilers with R CMD SHLIB

[Jarrod Hadfield]

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.
>


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