[Rcpp-devel] Package compilation error after a Mac update (related to the use of module and .constructor<const Rcpp::NumericVector &, int>()

[Dirk Eddelbuettel]

On 8 May 2019 at 09:43, Simon Urbanek wrote:
| It fails for me on Linux as well:
[...] 
| [Ubuntu 18.04.1 LTS; clang 7.0.0-3~ubuntu0.18.04.1]

I can confirm that on Ubuntu 18.10 if I uncomment / reset these in ~/.R/Makevars:

  CXX=ccache clang++
  CXX11=ccache clang++
  CC=ccache clang
  SHLIB_CXXLD=clang
  CXXFLAGS=-Wall -O3

Yet it also works as soon as remove the (understandable, from a pure C++
viewpoint) reference semantic (which with SEXP object is a lie anyway).


R> Rcpp::sourceCpp("/tmp/robin.cpp", verbose=TRUE, rebuild=TRUE)

Generated extern "C" functions 
--------------------------------------------------------


#include <Rcpp.h>

Generated R functions 
-------------------------------------------------------

`.sourceCpp_1_DLLInfo` <- dyn.load('/tmp/Rtmp6RAHjE/sourceCpp-x86_64-pc-linux-gnu-1.0.1.2/sourcecpp_314b38b4e773/sourceCpp_6.so')

library(Rcpp)
 populate( Rcpp::Module("MyModel",`.sourceCpp_1_DLLInfo`), environment() ) 

rm(`.sourceCpp_1_DLLInfo`)

Building shared library
--------------------------------------------------------

DIR: /tmp/Rtmp6RAHjE/sourceCpp-x86_64-pc-linux-gnu-1.0.1.2/sourcecpp_314b38b4e773

/usr/lib/R/bin/R CMD SHLIB -o 'sourceCpp_6.so' --preclean  'robin.cpp'  
ccache clang++ -I"/usr/share/R/include" -DNDEBUG   -I"/usr/local/lib/R/site-library/Rcpp/include" -I"/tmp"   -fpic  -Wall -O3 -c robin.cpp -o robin.o
clang -Wl,-S -shared -L/usr/lib/R/lib -Wl,-Bsymbolic-functions -Wl,-z,relro -o sourceCpp_6.so robin.o -L/usr/lib/R/lib -lR
R> 


Repaired code (which whitespace and identation to my and Emacs's liking)
below.

Dirk

-----------------------------------------------------------------------------
#include <Rcpp.h>
using namespace Rcpp;

class MyModel {
public:
  double a;
  ~MyModel();
  MyModel();
  MyModel(const Rcpp::NumericVector ModelData, int temp);
};

RCPP_EXPOSED_CLASS(MyModel)

MyModel::~MyModel() {}
MyModel::MyModel() : a(0) {}
MyModel::MyModel(const Rcpp::NumericVector ModelData, int temp) : a(0) {}

RCPP_MODULE(MyModel) {
  Rcpp::class_<MyModel>("MyModel")
  .constructor()
  .constructor<const Rcpp::NumericVector, int>()
  ;
}
-----------------------------------------------------------------------------


-- 
http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org