[Rcpp-devel] Rcpp shared libraries (?)

[THIOULOUSE JEAN]

Hi

Sorry to bother you again with my C/C++ problems in the ade4 package (available on CRAN & GitHub).

Thanks to your help, I have succeeded in converting several of the C functions to C++ using Rcpp. Now the package compiles without problem and all my C++ functions run fine in the dedicated GitHub branch of the package (ade4-Rcpp).

The new problem I am facing now is that in ade4, I use a library of about 30 utilities functions collected in one file named adesub.c, with adesub.h headers file. From what I understand, during package compilation these functions are added to the ade4 shared library and they can be called by my other C functions without being declared in the init.c or NAMESPACE files, as they do not need to be known by R.

I would like to know if it is possible to do the same thing in C++ with Rcpp. I have found reading the documentation (Dirk's book and Rcpp vignettes) that I could use R CMD SHLIB to build a shared library and then dyn.load it in R. I have created a file named ade4lib.cpp containing the utilities functions in the src directory, and I can make the shared library (ade4lib.so) with RCMD SHLIB. But this does not solve my problem because, as I understand it, this makes the utilities library functions available to R (which is useless since they are not interfaced correctly to R but to C++), and not to the other C++ functions (which is what i need to do).

Can anybody see where I am mistaken, and point me to the right direction to accomplish this ?

Thank you,
Jean

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Jean THIOULOUSE - https://lbbe-web.univ-lyon1.fr/en/annuaires-des-membres/thioulouse-jean
https://orcid.org/0000-0001-7664-0598 (ORCID page)
https://www.springer.com/fr/book/9781493988488 (ade4 Book)
https://pbil.univ-lyon1.fr/JTHome/Biblio/ThioulouseEB2021.pdf (Evol. Biol. paper)