Log Message:
Update to 4.0.3

CHANGES IN R 4.0.3:

  NEW FEATURES:

    * On platforms using configure option --with-internal-tzcode,
      additional values "internal" and (on macOS only) \ 
"macOS" are
      accepted for the environment variable TZDIR.  (See ?TZDIR.)

      On macOS, "macOS" is used by default if the system timezone
      database is a newer version than that in the R installation.

    * When install.packages(type = "source") fails to find a package in
      a repository it mentions package versions which are excluded by
      their R version requirement and links to hints on why a package
      might not be found.

    * The default value for options("timeout") can be set from
      enviromnent variable R_DEFAULT_INTERNET_TIMEOUT, still defaulting
      to 60 (seconds) if that is not set or invalid.

      This may be needed when child R processes are doing downloads,
      for example during the installation of source packages which
      download jars or other forms of data.

  LINK-TIME OPTIMIZATION on a UNIX-ALIKE:

    * There is now support for parallelized Link-Time Optimization
      (LTO) with GCC and for 'thin' LTO with clang _via_ setting the
      LTO macro.

    * There is support for setting a different LTO flag for the Fortran
      compiler, including to empty when mixing clang and gfortran (as
      on macOS).  See file config.site.

    * There is a new LTO_LD macro to set linker options for LTO
      compilation, for example to select an alternative linker or to
      parallelize thin LTO.

  DEPRECATED AND DEFUNCT:

    * The LINPACK argument to chol.default(), chol2inv(),
      solve.default() and svd() has been defunct since R 3.1.0.  Using
      it now gives a warning which will become an error in R 4.1.0.

  BUG FIXES:

    * The code mitigating stack overflow with PCRE regexps on very long
      strings is enabled for PCRE2 < 10.30 also when JIT is enabled,
      since stack overflows have been seen in that case.

    * Fix to correctly show the group labels in dotchart() (which where
      lost in the ylab improvement for R 4.0.0).

    * addmargins(*, ..) now also works when fn() is a local function,
      thanks to bug report and patch PR#17124 from Alex Bertram.

    * rank(x) and hence sort(x) now work when x is an object (as per
      is.object(x)) of type "raw" _and_ provides a valid `[` method,
      e.g., for gmp::as.bigz(.) numbers.

    * chisq.test(*, simulate.p.value=TRUE) and r2dtable() now work
      correctly for large table entries (in the millions).  Reported by
      Sebastian Meyer and investigated by more helpers in PR#16184.

    * Low-level socket read/write operations have been fixed to
      correctly signal communication errors. Previously, such errors
      could lead to a segfault due to invalid memory access. Reported
      and debugged by Dmitriy Selivanov in PR#17850.

    * quantile(x, pr) works more consistently for pr values slightly
      outside [0,1], thanks to Suharto Anggono's PR#17891.

      Further, quantile(x, prN, names=FALSE) now works even when prN
      contains NAs, thanks to Anggono's PR#17892.  Ditto for ordered
      factors or Date objects when type = 1 or 3, thanks to PR#17899.

    * Libcurl-based internet access, including curlGetHeaders(), was
      not respecting the "timeout" option.  If this causes
      unanticipated timeouts, consider increasing the default by
      setting R_DEFAULT_INTERNET_TIMEOUT.

    * as.Date(<char>) now also works with an initial "", thanks to
      Michael Chirico's PR#17909.

    * isS3stdGeneric(f) now detects an S3 generic also when it it is
      trace()d, thanks to Gabe Becker's PR#17917.

    * R_allocLD() has been fixed to return memory aligned for long
      double type PR#16534.

    * fisher.test() no longer segfaults when called again after its
      internal stack has been exceeded PR#17904.

    * Accessing a long vector represented by a compact integer sequence
      no longer segfaults (reported and debugged by Hugh Parsonage).

    * duplicated() now works also for strings with multiple encodings
      inside a single vector PR#17809.

    * phyper(11, 15, 0, 12, log.p=TRUE) no longer gives NaN; reported
      as PR#17271 by Alexey Stukalov.

    * Fix incorrect calculation in logLik.nls() PR#16100, patch from
      Sebastian Meyer.

    * A very old bug could cause a segfault in model.matrix() when
      terms involved logical variables.  Part of PR#17879.

    * model.frame.default() allowed data = 1, leading to involuntary
      variable capture (rest of PR#17879).

    * tar() no longer skips non-directory files, thanks to a patch by
      Sebastian Meyer, fixing the remaining part of PR#16716.