** libsccache gcc -I/usr/share/R/include -DNDEBUG   -I"/usr/local/lib/R/site-library/Rcpp/include"  -fopenmp -fpic  -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -g  -O3 -Wall -pipe -pedantic -std=gnu99 -c cutil.c -o cutil.occache g++ -I/usr/share/R/include -DNDEBUG   -I"/usr/local/lib/R/site-library/Rcpp/include"  -I. -fopenmp -std=c++11 -fpic  -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -g  -O3 -Wall -pipe -Wno-unused -pedantic -c is.cpp -o is.occache g++ -I/usr/share/R/include -DNDEBUG   -I"/usr/local/lib/R/site-library/Rcpp/include"  -I. -fopenmp -std=c++11 -fpic  -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -g  -O3 -Wall -pipe -Wno-unused -pedantic -c manip.cpp -o manip.omanip.cpp: In function ‘Rcpp::String icd9AddLeadingZeroesMajorSingle(Rcpp::String)’:manip.cpp:25:12: error: ambiguous overload for ‘operator==’ (operand types are ‘Rcpp::String’ and ‘SEXP’)  if (major == NA_STRING) {            ^manip.cpp:25:12: note: candidates are:In file included from /usr/local/lib/R/site-library/Rcpp/include/Rcpp/Vector.h:67:0,                 from /usr/local/lib/R/site-library/Rcpp/include/Rcpp.h:38,                 from ./convert.h:22,                 from manip.cpp:20:/usr/local/lib/R/site-library/Rcpp/include/Rcpp/String.h:414:14: note: bool Rcpp::String::operator==(const Rcpp::String&) const         bool operator==( const Rcpp::String& other) const {              ^/usr/local/lib/R/site-library/Rcpp/include/Rcpp/String.h:429:14: note: bool Rcpp::String::operator==(const const_StringProxy&) const         bool operator==( const const_StringProxy& other) const {              ^/usr/lib/R/etc/Makeconf:143: recipe for target 'manip.o' failedmake: *** [manip.o] Error 1make: *** Waiting for unfinished jobs....

bool operator==( SEXP other) const {                                    return get_sexp() == other;                                     }                                                                   bool operator!=( SEXP other) const {                                    return get_sexp() != other;                                      }

edd@max:/tmp/rcpp-tmp/Rcpp$ diff -u ~/git/rcpp/inst/include/Rcpp/String.h inst/include/Rcpp/String.h                                                                                                                 --- /home/edd/git/rcpp/inst/include/Rcpp/String.h2015-09-0809:59:23.570918337 -0500+++ inst/include/Rcpp/String.h2015-09-0905:54:04.478869310 -0500@@ -438,6 +438,14 @@return strcmp( get_cstring(), other.get_cstring() ) >0;         }+booloperator==( SEXP other )const {+returnget_sexp() == other;+        }++booloperator!=( SEXP other )const {+returnget_sexp() != other;+        }+private:/** the CHARSXP this String encapsulates*/edd@max:/tmp/rcpp-tmp/Rcpp$