Ludovic Courtès <ludo@gnu.org> writes:

>> +    (synopsis "Rcpp integration for the linear algebra library 'Armadillo'")
>
> “for the Armadillo linear algebra library” maybe?

Okay.

>> +    (description
>> +     "Armadillo is a templated C++ linear algebra library that aims towards a
>> +good balance between speed and ease of use.  Integer, floating point and
>> +complex numbers are supported, as well as a subset of trigonometric and
>> +statistics functions.  Various matrix decompositions are provided through
>> +optional integration with LAPACK and ATLAS libraries.  This package includes
>> +the header files from the templated Armadillo library.")
>> +    ;; Armadillo is licensed under the MPL 2.0, while RcppArmadillo (the Rcpp
>> +    ;; bindings to Armadillo) is licensed under the GNU GPL version 2 or
>> +    ;; later, as is the rest of 'Rcpp'.
>> +    (license license:gpl2+)))
>
> Does this package bundle a copy of Armadillo?  If yes, it would be great
> if we could make a separate Armadillo package that r-rcpparmadillo would
> depend on.

It bundles the headers of a particular version (6.200.2, latest is
6.400.3) of Armadillo.  I just made a package for Armadillo 6.400.3 and
derived a package variant for 6.200.2 (both attached), used that as an
input and removed the includes from RcppArmadillo with a snippet.

The package builds, but there’s a linker problem that I don’t know how
to fix:

    ** testing if installed package can be loaded
    Error in dyn.load(file, DLLpath = DLLpath, ...) : 
      unable to load shared object '/gnu/store/vgnld4sl6ki7k1d70cjqk4rm68iimybp-r-rcpparmadillo-0.6.200.2.0/site-library/RcppArmadillo/libs/RcppArmadillo.so':
      /gnu/store/vgnld4sl6ki7k1d70cjqk4rm68iimybp-r-rcpparmadillo-0.6.200.2.0/site-library/RcppArmadillo/libs/RcppArmadillo.so: undefined symbol: wrapper_dgesv_
    Error: loading failed
    Execution halted
    ERROR: loading failed
    * removing ‘/gnu/store/vgnld4sl6ki7k1d70cjqk4rm68iimybp-r-rcpparmadillo-0.6.200.2.0/site-library/RcppArmadillo’
    phase `install' failed after 21.5 seconds

It’s probably something to do with linking to lapack or something, but I
don’t know how to address this.

The bundled includes in “inst/include/armadillo*” are almost identical
to those provided by the armadillo package.  The “config.hpp” file has
been patched to comment out a couple of defines and a cmake file was
added.

~~ Ricardo