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.