and was only ever used when preparing package

objects in lazy-load databases.  Typically tasks spend up to 5% of

their time on such operations, although creating lazy-data

This can be suppressed if the library is available by the

not worked reliably since 2019 and has been removed.

It is intended to increase this to 2.72 for

The minimum version requirement for an external LAPACK has

No default C++ compiler is set if no C++17 compiler is

detected: there is no longer an automatic fallback to C++14 or

Compilers from the last five years should have sufficient

The Objective-C++ compiler now by default uses the standard

for C++ (currently C++17) rather than the default

standard for the C++ compiler (which on macOS is still C++98).

Accelerate framework.  Those interfaces are only available in macOS

By default the option uses new Accelerate for BLAS calls: to also

later interfaces provide LAPACK 3.9.1 rather than 3.2.1: 3.9.1 is

from 2021-04 and does not include the improved algorithms

introduced in LAPACK 3.10.0 (including for BLAS calls).

The makefiles and installer scripts for Windows have been

is based on GCC 13 and newer versions of

and libraries (targeting 64-bit Intel CPUs).  R-devel can no longer be

Rtools44 has experimental support for 64-bit ARM

without declaring a strong dependence on package

names ending in a period; this is ignored by

To see the failing lines set environment variable

that this will in future become the default for compiling C++.

%% E.g. become part of \code{check --no-cran} for R 4.5.0.

to mark example code whose output should be ignored when comparing

shown on the rendered help page, so provides a clean alternative

packages are not portable and may fail to install on some platforms.

unneeded by their documented entry points.  They no longer do so.

to support experimenting with alternative object systems.  The

deprecated.  Based on contributions from the R Consortium's

are now deprecated.  They do not support recent

graphics enhancements and their font handling is rudimentary. The