produced -- attempting to exceed this is an error.  (Previously it

system time zone as part of the locale information.  Also, the

source (system/internal) of the date-time conversion and printing

set on the (almost all) platforms which have C-level support,

There are comprehensive validity checks on the structure of

formatting and printing).  (This avoids mis-conversions of

There is some support for using the native date-time

routines on macOS: this is only viable on recent versions

12.6 and 13) and does get wrong some historical changes

indicating if it is known to be filled or fully

rewritten to gain better default tick locations and better default

The mapping of Windows' names for time zones to

names has been updated.  When ICU is available (it is

by default), it is used to get a mapping for the current region set in

Windows.  This can be overridden by setting environment variable

functions for rendering typeset glyphs, primarily:

Rendering of typeset glyphs is only supported so far on the

simple interpretation of original Porter-Duff definitions).

Support for gradients, patterns, clipping paths, masks,

groups, compositing operators, and affine transformations has

A system installation of generic LAPACK 3.10.0 or later will

is looked for and used if it reports version

3.10.0 or later and does not contain BLAS routines.

Packages using LAPACK will need to be reinstalled if this changes

(which has been seen on platforms missing

the default and ignored (with a warning).  It is highly

recommended that the system headers are installed alongside

: they are part of its packaging on some Linux

distributions and packaged separately (e.g.

The system headers will be required in a future release of

despite a change in major version number it changes neither API

toolchain.  It is based on GCC 12 and newer versions of

binutils and libraries.  At this time R-devel can still

Rtools42 without changes, but when R-devel is

installed via the installer, it will by default look for

Default builds (including for packages) no longer select