This blog is updated daily.
A general description is here.
Hashed ‘environment’s with sizes less than 5 now can grow, too. (Reported to R-devel by Duncan Garmonsway.)
‘configure’ option ‘--with-lapack=no’ (equivalently ‘--without-lapack’) forces compilation of the internal LAPACK sources.
If ‘--with-lapack’ is not specified, a system ‘liblapack’ is looked for and used if it reports version 3.10.0 or later and does not contain BLAS routines.
Using 3.10.0 may give some different signs in SVDs (seen in the ‘lapack.R’ test).
Packages using LAPACK will need to be reinstalled if this changes to using an external library.
The set utility functions, notably ‘intersect()’ have been tweaked to be more consistent and symmetric in their two set arguments, also preserving a common ‘mode’, see ‘?sets’.