[Rcpp-devel] R very basic compilation error

[Bharath Govindarajan]

Hi,

At the outset I would like to thank the developers of rcpp for this
wonderful tool. My question
is elementary but I am posting it here only because on stack exchange I see
Dirk suggesting that
this is a better place to get replies.

Thanks again
Bharath



Places I searched so far :
-------------------------------------
google , stack exchange :
" rcpp compilation error __attribute__ "
" rcpp Reference.h:25 error"
" rcpp asm error"



> version
               _
platform       x86_64-unknown-linux-gnu
arch           x86_64
os             linux-gnu
system         x86_64, linux-gnu
status
major          2
minor          15.1
year           2012
month          06
day            22
svn rev        59600
language       R
version.string R version 2.15.1 (2012-06-22)
nickname       Roasted Marshmallows

Description of problem:
--------------------------------
I tried a very simple example from Hadley Wickham's website and it worked
https://github.com/hadley/devtools/wiki/Rcpp

cppFunction('
  double sumC(NumericVector x) {
    int n = x.size();
    double total = 0;
    for(int i = 0; i < n; ++i) {
      total += x[i];
    }
    return total;
  }
')

Then I try an example written in a c source file from
http://dirk.eddelbuettel.com/blog/2012/11/14/
 and source it and get compilation errors

test1.c
------
#include <Rcpp.h>

// [[Rcpp::export]]
Rcpp::DataFrame mypnorm(Rcpp::NumericVector x) {
    int n = x.size();
    Rcpp::NumericVector y1(n), y2(n), y3(n);

    for (int i=0; i<n; i++) {

        // the way we used to do this
        y1[i] = ::Rf_pnorm5(x[i], 0.0, 1.0, 1, 0);

        // the way we can do it now
        y2[i] = R::pnorm(x[i], 0.0, 1.0, 1, 0);

    }
    // or using Rcpp sugar in one go
    y3 = Rcpp::pnorm(x);

    return Rcpp::DataFrame::create(Rcpp::Named("Rold")  = y1,
                                   Rcpp::Named("Rnew")  = y2,
                                   Rcpp::Named("sugar") = y3);
}

commands:
---------
sourceCpp(LIB.PATH %+% "test1.c",verbose=TRUE)

Error:
------

R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/internal/wrap_end.h:25:
error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Rcpp'
In file included from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/meat.h:25,
                 from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp.h:81,
                 from test1.c:1:
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/RObject.h:25:
error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Rcpp'
In file included from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/meat.h:26,
                 from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp.h:81,
                 from test1.c:1:
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/Environment.h:25:
error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Rcpp'
In file included from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/meat.h:27,
                 from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp.h:81,
                 from test1.c:1:
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/DottedPair.h:25:
error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Rcpp'
In file included from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/meat.h:28,
                 from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp.h:81,
                 from test1.c:1:
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/Vector.h:25:
error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Rcpp'
In file included from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/meat.h:29,
                 from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp.h:81,
                 from test1.c:1:
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/Matrix.h:25:
error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Rcpp'
In file included from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/meat.h:30,
                 from
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp.h:81,
                 from test1.c:1:
R/x86_64-unknown-linux-gnu-library/2.15/Rcpp/include/Rcpp/api/meat/Reference.h:25:
error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Rcpp'
test1.c:4: error: expected '=', ',', ';', 'asm' or '__attribute__' before
':' token
test1.c:28: error: expected identifier or '(' before string constant
make: *** [test1.o] Error 1
Error in sourceCpp(LIB.PATH %+% "test1.c", verbose = TRUE) :
  Error 1 occurred building shared library.
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