R-devel has been switched to use reference counting by default with r77508. Building with -DSWITCH_TO_NAMED goes back to the NAMED mechanism.
Best, luke On Sun, 24 Nov 2019, luke-tier...@uiowa.edu wrote: > Baring any unforeseen issues R-devel will switch in about a week from > the NAMED mechanism to reference counting for determining when objects > can be safely mutated in base C code. This is expected to have minimal > impact on packages not using unsupported coding practices in their C > code. > > > The transition to reference counting has been in progress for a > number of years. Some older notes on this are available at > http://developer.r-project.org/Refcnt.html. These may no longer be > completely accurate but should give you an idea of what is going on. > > If you want to test your package under reference counting you can do > so by building R with -DSWITCH_TO_REFCNT added to CFLAGS or DEFS in a > config.site file. > > A small number of packages are still using the NAMED or SET_NAMED > functions even though this has been discouraged for some time. > For now these will not produce errors but also not do anything useful. > They will probably be removed before R 4.0.0 is released, so you > should look at why you are using them and adjust accordingly. > > Best, > > luke > > > -- Luke Tierney Ralph E. Wareham Professor of Mathematical Sciences University of Iowa Phone: 319-335-3386 Department of Statistics and Fax: 319-335-3017 Actuarial Science 241 Schaeffer Hall email: luke-tier...@uiowa.edu Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
