Using 3rd party header files with Rcpp

Question

I have a header file called coolStuff.h that contains a function awesomeSauce(arg1) that I would like to use in my cpp source file.

Directo

Answer 1

We can add it by writing path to the header in the PKG_CXXFLAGS variable of the .R/Makevars file as shown below. The following is an example of adding header file of xtensor installed with Anaconda in macOS.

⋊> ~ cat ~/.R/Makevars                                                                                                                              
CC=/usr/local/bin/gcc-7
CXX=/usr/local/bin/g++-7
CPLUS_INCLUDE_PATH=/opt/local/include:$CPLUS_INCLUDE_PATH
PKG_CXXFLAGS=-I/Users/kuroyanagi/.pyenv/versions/miniconda3-4.3.30/include
LD_LIBRARY_PATH=/opt/local/lib:$LD_LIBRARY_PATH
CXXFLAGS= -g0 -O3 -Wall
MAKE=make -j4