Linking problem with (Rcpp)armadillo and Makevars

[jchiquet]

I am trying to wrap the optim library of @kthor in R via an R package using Rcpp/RcppArmadillo. Indeed, optim relies on armadillo itself.

To do that, I put the headers of optim into inst/include/ and the cpp files into src/. Then I tried to link everything in the src/Makevars files, and the package installation (including compilation of optim) is fine (at least, the package can be installed). The Makevars can be found there :

https://github.com/jchiquet/optimLibR/blob/414015b08a5e316de17b1e0b5385718abd23da6a/src/Makevars#L1-L41

Then I tried to create two small Rcpp functions for two examples available in the original optim library, starting with the following lines

// [[Rcpp::depends(RcppArmadillo)]]
// [[Rcpp::plugins(cpp11)]]
#define USE_RCPP_ARMADILLO
#include "optim.hpp"

However, when I call the corresponding R functions, I get the following Armadillo errors in R which I do not have wheh running them in 'pure' C++ (I am pretty sure it is not a syntax problem, the Rcpp code and the original C++ code are hopefully identical, except for the headers).

> library(optimLibR)
> ackley_function()
error: arma::memory::acquire(): out of memory

> library(optimLibR)
> logit_optimLib()
error: Mat::init(): requested size is not compatible with column vector layout

If someone with experience in writing R packages including external librarieis can at least check that the flags and libs in the Makevars are correctly set for optim/armadillo requirements, it would help a lot.

Thanks for your time

[jchiquet]

Solved thanks to @kthohr kthohr/optim#2