Dear R-devel,
The Writing R Extensions manual states:
6.14 Platform and version information
The header files define USING_R, which can be used to test if the code
is indeed being used with R.
I suppose this only applies to building R itself? Or, perhaps when Rcpp
is used for the interface, or if one includes R headers explicitly.
I have a C++ library that is built with no R-dependencies, then wrapped
with an Rcpp interface. This same library is wrapped with pybind11 in
the Python world, and directly used in C++ applications.
How can the C++ library code "know" that it's R building the library? Is
there a platform-independent environment variable or macro?
Thanks.
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