[R] rtools fstream error

[sunaga at telenet.be]

Thank you, it worked. 
For completeness, had to add Rf_ in front of allocVector (and possibly any other function from Rdefines.h) 


----- Original Message -----

From: "William Dunlap" <wdunlap at tibco.com> 
To: sunaga at telenet.be 
Cc: r-help at r-project.org 
Sent: Monday, February 2, 2015 10:29:19 PM 
Subject: Re: [R] rtools fstream error 

Try adding the line 
#define R_NO_REMAP 
to the top of your file (before any #include's) so the R 
include files don't define length(x). 

Bill Dunlap 
TIBCO Software 
wdunlap tibco.com 

On Mon, Feb 2, 2015 at 1:11 PM, < sunaga at telenet.be > wrote: 


Hi, 

when writing a simple cpp function to be run in R I obtain a compilation error as soon as I include fstream. Any hints of what goes wrong and how to fix it? It's Windows 7 64-bit, R-3.1.2 and Rtools32. An example to recreate the error: 

#include <R.h> 
#include <Rdefines.h> 
#include <fstream> 
using namespace std; 

extern "C" SEXP test(SEXP x) { 
SEXP result; 

PROTECT(result = allocVector(REALSXP,1)); 
REAL(result)[0] = REAL(x)[0]*5; 

UNPROTECT(1); 
return result; 
} 

Output: 

> R CMD SHLIB test.cpp 
g++ -m64 -I"C:/PROGRA~1/R/R-31~1.2/include" -DNDEBUG -I"d:/RCompile/CRANpkg/ 
extralibs64/local/include" -O2 -Wall -mtune=core2 -c test.cpp -o test.o 
In file included from c:\rtools\gcc-4.6.3\bin\../lib/gcc/i686-w64-mingw32/4.6.3/ 
../../../../include/c++/4.6.3/fstream:42:0, 
from test.cpp:3: 
c:\rtools\gcc-4.6.3\bin\../lib/gcc/i686-w64-mingw32/4.6.3/../../../../include/c+ 
+/4.6.3/bits/codecvt.h:216:45: error: macro "length" passed 4 arguments, but tak 
es just 1 
In file included from c:\rtools\gcc-4.6.3\bin\../lib/gcc/i686-w64-mingw32/4.6.3/ 
../../../../include/c++/4.6.3/fstream:921:0, 
from test.cpp:3: 
c:\rtools\gcc-4.6.3\bin\../lib/gcc/i686-w64-mingw32/4.6.3/../../../../include/c+ 
+/4.6.3/bits/fstream.tcc:826:60: error: macro "length" passed 4 arguments, but t 
akes just 1 
c:\rtools\gcc-4.6.3\bin\../lib/gcc/i686-w64-mingw32/4.6.3/../../../../include/c+ 
+/4.6.3/bits/fstream.tcc:943:39: error: macro "length" passed 4 arguments, but t 
akes just 1 
In file included from c:\rtools\gcc-4.6.3\bin\../lib/gcc/i686-w64-mingw32/4.6.3/ 
../../../../include/c++/4.6.3/fstream:42:0, 
from test.cpp:3: 
c:\rtools\gcc-4.6.3\bin\../lib/gcc/i686-w64-mingw32/4.6.3/../../../../include/c+ 
+/4.6.3/bits/codecvt.h:215:7: error: expected ';' at end of member declaration 
c:\rtools\gcc-4.6.3\bin\../lib/gcc/i686-w64-mingw32/4.6.3/../../../../include/c+ 
+/4.6.3/bits/codecvt.h:217:7: error: expected unqualified-id before '{' token 
make: *** [test.o] Error 1 

Thanks, 
sunaga 

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