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, <sun...@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
>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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