[R-sig-hpc] snowfall and calling C++ code with .C

[Vinh Nguyen]

> Dear R-sig-hpc,
>
> I am having trouble using sfSapply on a function that calls a C function
> through the .C interface.  When executing in serial I have no errors, but in
> parallel I have the error that each node cannot find the function called by
> .C
>
> i.e. if I have
>
> myfn <- function(){  .C("myfunction") }
>
> I get the error
> C symbol name "myfunction" not in load table
>
>
>
> I use sfExportAll() and sfLibrary(mylibrary) before calling the parallel
> code.  Thanks so much for your help!
>
> Sincerely,
> Carl

You will also need to do:
sfClusterEval(.dynload("file.so"))
to load the shared object in each node.

Vinh