Dear list,
When I compile Rcpp modules with clang, I see a number of warnings that seem to
come from Rcpp. Below is a small file containing a fairly useless module
(test.cpp).
test.cpp:
---8<-----
#include <Rcpp.h>
class Foo {
public:
Foo(double a) : a(a) {}
double run(double b) { return a+b; }
private:
double a;
};
RCPP_MODULE(test) {
Rcpp::class_<Foo>("Foo")
.constructor<double>()
.method("run", &Foo::run);
}
----->8---
Compiling this with sourceRcpp (though obviously that won't finish because no
attributes) or through R CMD SHLIB (with a local Makevars file following the
Rcpp FAQ) generates warnings:
clang++ -I/Library/Frameworks/R.framework/Resources/include
-I/Library/Frameworks/R.framework/Resources/include/x86_64 -DNDEBUG
-I/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include
-Wall -ansi -pedantic -I/usr/local/include -fPIC -O2 -Wall -c test.cpp -o
test.o
In file included from test.cpp:1:
In file included from
/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include/Rcpp.h:48:
/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include/Rcpp/XPtr.h:39:5:
warning: delete called on
'Rcpp::CppProperty<Foo>' that has virtual functions but non-virtual
destructor [-Wdelete-non-virtual-dtor]
delete obj ;
^
/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include/Rcpp/XPtr.h:50:44:
note: in instantiation of function
template specialization
'Rcpp::standard_delete_finalizer<Rcpp::CppProperty<Foo> >' requested here
template <typename T, void Finalizer(T*) = standard_delete_finalizer<T> >
^
/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include/Rcpp/module/class.h:392:26:
note: in instantiation of member
function 'Rcpp::S4_field<Foo>::S4_field' requested here
out[i] = S4_field<Class>( it->second, class_xp ) ;
^
test.cpp:12:3: note: in instantiation of member function
'Rcpp::class_<Foo>::fields' requested here
Rcpp::class_<Foo>("Foo")
^
1 warning generated.
g++ -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup
-single_module -multiply_defined suppress -L/usr/local/lib -o test.so test.o
/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/lib/x86_64/libRcpp.a
-F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework
-Wl,CoreFoundation
If I increase the warnings to the level that CRAN are apparently using
(changing CXXFLAGS to -O2 -Wall -pedantic -Wconversion) I get pages and pages
of warnings (not pasted here). So far as I can see, these come from Rcpp, but
if I'm doing anything wrong, I'd appreciate any pointers.
Versions and flag information below.
Thanks,
Rich
Makevars contains:
CXX=clang++
CC=clang
CXXFLAGS=-O2 -Wall
Versions:
Apple clang version 4.0 (tags/Apple/clang-421.0.57) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin12.2.1
Thread model: posix
Mac OS X 10.8 (Mountain Lion), Xcode 4.5.1
sessionInfo:
R version 2.15.3 (2013-03-01)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
locale:
[1] en_AU.UTF-8/en_AU.UTF-8/en_AU.UTF-8/C/en_AU.UTF-8/en_AU.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] Rcpp_0.10.2
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