R devel - Apr 2007 - undefined symbol: Rf_rownamesgets

I get the error
 undefined symbol: Rf_rownamesgets
when I try to load my package, which include C++ code that calls that
function.  This is particularly strange since the code also calls
Rf_classgets, and it loaded OK with just that.

Can anyone tell me what's going on?  

For the record, I worked around this with the general purpose
attribute setting commands and R_RowNamesSymbol.  I discovered that
even with that I wasn't constructing a valid data.frame, and fell back
to returning a list of results.

I notice Rinternals.h defines
LibExtern SEXP	R_RowNamesSymbol;   /* "row.names" */
twice in the same block of code.

I'm using R 2.4.1 on Debian. The symbol seems to be there:
$ nm -D /usr/lib/R/lib/libR.so | grep classgets
00032e70 T Rf_classgets
$ nm -D /usr/lib/R/lib/libR.so | grep namesgets
00031370 T Rf_dimnamesgets
00034500 T Rf_namesgets

The source includes
#define R_NO_REMAP 1
#include <R.h>
#include <Rinternals.h>
and later
#include <memory>  // I think this is why I needed R_NO_REMAP

I realize this is not a complete example, but I'm hoping this will
ring a bell with someone.  I encountered this while running
R CMD check.  The link line generated was
g++ -shared  -o mspath.so AbstractTimeStepsGenerator.o Coefficients.o
CompositeHistoryComputer.o CompressedTimeStepsGenerator.o Covariates.o Data.o
Environment.o Evaluator.o FixedTimeStepsGenerator.o LinearProduct.o Manager.o
Model.o ModelBuilder.o Path.o PathGenerator.o PrimitiveHistoryComputer.o
SimpleRecorder.o Specification.o StateTimeClassifier.o SuccessorGenerator.o
TimePoint.o TimeStepsGenerator.o mspath.o mspathR.o   -L/usr/lib/R/lib -lR

Thanks.
Ross

On 4/17/2007 10:43 PM, Ross Boylan wrote:
> I get the error
>  undefined symbol: Rf_rownamesgets
> when I try to load my package, which include C++ code that calls that
> function.  This is particularly strange since the code also calls
> Rf_classgets, and it loaded OK with just that.
> 
> Can anyone tell me what's going on?  
> 
> For the record, I worked around this with the general purpose
> attribute setting commands and R_RowNamesSymbol.  I discovered that
> even with that I wasn't constructing a valid data.frame, and fell back
> to returning a list of results.
> 
> I notice Rinternals.h defines
> LibExtern SEXP	R_RowNamesSymbol;   /* "row.names" */
> twice in the same block of code.
> 
> I'm using R 2.4.1 on Debian. The symbol seems to be there:
> $ nm -D /usr/lib/R/lib/libR.so | grep classgets
> 00032e70 T Rf_classgets
> $ nm -D /usr/lib/R/lib/libR.so | grep namesgets
> 00031370 T Rf_dimnamesgets
> 00034500 T Rf_namesgets
I don't see Rf_rownamesgets there, or in the R Externals manual among 
the API entry points listed.  Can't you use the documented dimnamesgets?

Duncan Murdoch
> The source includes
> #define R_NO_REMAP 1
> #include <R.h>
> #include <Rinternals.h>
> and later
> #include <memory>  // I think this is why I needed R_NO_REMAP
> 
> I realize this is not a complete example, but I'm hoping this will
> ring a bell with someone.  I encountered this while running
> R CMD check.  The link line generated was
> g++ -shared  -o mspath.so AbstractTimeStepsGenerator.o Coefficients.o
CompositeHistoryComputer.o CompressedTimeStepsGenerator.o Covariates.o Data.o
Environment.o Evaluator.o FixedTimeStepsGenerator.o LinearProduct.o Manager.o
Model.o ModelBuilder.o Path.o PathGenerator.o PrimitiveHistoryComputer.o
SimpleRecorder.o Specification.o StateTimeClassifier.o SuccessorGenerator.o
TimePoint.o TimeStepsGenerator.o mspath.o mspathR.o   -L/usr/lib/R/lib -lR
> 
> Thanks.
> Ross
> 
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