From: Edward Feng (efeng@cogeco.ca)
Date: Wed 31 Dec 2003 - 20:17:34 EST
Message-id: <001101c3cf7e$ee2a89e0$d2cf3918@fhty3>
Hi there,
I am using C++ Builder 5 to develop windows GUI interface for a R library package. I have to pass R objects to and from C functions and also evaluate them within C functions. But I always got linking error message of "unresolved external functions" with those internal functions or macros defined in Rinternals.h file. I can not find the reason.
I have included R.h and Rinternals.h, generated and added R.lib and R.def to the project. It seems no effects. I tried to directly use structure member instead of a macro, e.g. "LENGTH(OBJ)" with "((VECSEXP) (obj))->vecsxp.length", getting an error "Symbol VECSEXP not defined".
I noticed when generating R.lib and .def file, it reported warning messages about some duplicated functions within R.dll. But I am not sure whether it is the reason and how to solve it.
I am using C++Builder 5, R 1.7.0.1 windows version, used impdef.exe and implib.exe to generating lib and def files, and used VCL components to develop the windows interfaces.
Can you pleased to give me some advices?
Edward
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