PKG_CPPFLAGS,
PKG_CXXFLAGS, and
PKG_LIBS which I had mentioned recently
here
and
here.
There is also a brand-new and shiny
R-Forge project
for it.
A new release of Rcpp will probably follow in due course as we can now depend on this new inline version; Romain has also put nice new code in around exceptions and we may add some more on external pointers. Good times ...