[R-br] Rcpp cppFunction

[Carlos Trucios Maza]

Pessoal boa tarde,

Estou tentando reproducir um código do livro sobre Rcpp e não estou conseguindo. Alguém tem alguma ideia de porque não funciona?
(Trabalho com OS X 10.8.4).


code <- '
#include <gsL/gsl_const_mksa.h>           // decl of constants
std::vector<double> volumes() {
std::vector<double> v(5);
v[0] = GSL_CONST_MKSA_US_GALLON;       // 1 US gallon
v[1] = GSL_CONST_MKSA_CANADIAN_GALLON; // 1 Canadian gallon
v[2] = GSL_CONST_MKSA_UK_GALLON;       // 1 UK gallon
v[3] = GSL_CONST_MKSA_QUART;           // 1 quart
v[4] = GSL_CONST_MKSA_PINT;            // 1 pint
return v;
}'

gslVolumes <- cppFunction(code, depends="RcppGSL")

mas aparece o seguinte erro

file16e2b6cb966.cpp: In function ‘SEXPREC* sourceCpp_52966_volumes()’:
file16e2b6cb966.cpp:30: error: ‘__result’ was not declared in this scope
make: *** [file16e2b6cb966.o] Error 1
llvm-g++-4.2 -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -DNDEBUG -I/usr/local/include -I/Library/Frameworks/R.framework/Versions/3.0/Resources/library/Rcpp/include -I/usr/local/include  -I"/Library/Frameworks/R.framework/Versions/3.0/Resources/library/Rcpp/include" -I"/Library/Frameworks/R.framework/Versions/3.0/Resources/library/RcppGSL/include"    -fPIC  -mtune=core2 -g -O2  -c file16e2b6cb966.cpp -o file16e2b6cb966.o 
Erro em sourceCpp(code = code, env = env, rebuild = rebuild, showOutput = showOutput,  : 
  Error 1 occurred building shared library.