[R] rtools fstream error

sunaga at telenet.be
Mon, 02 Feb 2015 22:25:02 -0000

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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