Using Rcpp within parallel code via snow to make a cluster

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Think it through — what does inline do? It creates a C/C++ function for you, then compiles and links it into a dynamically-loadable shared library. Where does that one sit? In R’s temp directory.

So you tried the right thing by shipping the R frontend calling that shared library to the other process (which has another temp directory !!), but that does not get the dll / so file there.

Hence the advice is to create a local package, install it and have both snow processes load and call it.

(And as always: better quality answers may be had on the rcpp-devel list which is read by more Rcpp constributors than SO is.)

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