Question

I am trying to use R to generate 2 files the first one actually generates pretty good but the 2nd one tells me the following:

conteo_correlaciones.c:3:15: error: R.h: No such file or directory
conteo_correlaciones.c:4:24: error: Rinternals.h: No such file or
directory conteo_correlaciones.c:31: error: expected ‘=’, ‘,’, ‘;’,
‘asm’ or ‘attribute’ before ‘countcorrelations’

both R.h and Rinternals.h were copied from the R directory and they’re in the same directory that the rest of the files but I can’t get past this error, these files are being called by an include like this:

#include <R.h>
#include <Rinternals.h>

and what I’m doing in the terminal is:

R CMD SHLIB conteo_correlaciones.c

Which works great and generates me the correct file and:

gcc -dynamiclib conteo_correlaciones.c -o conteo_correlaciones.so

Which throws me the aforementioned error. Any idea what could be?

Answer 1

You have to change

#include <R.h>
#include <Rinternals.h>

to

#include "R.h"
#include "Rinternals.h"

if the header files are in the same directory like your code files.
Or you could add the correct include-path to gcc commandline (e.g. -I/usr/share/R/include).