+2020-01-18 Nick Clifton <nickc@redhat.com>
+
+ Synchronize top level configure files with master version:
+
+ 2020-01-01 Ben Elliston <bje@gnu.org>
+
+ * config.guess: Update copyright years.
+ * config.sub: Likewise.
+
+ 2019-12-21 Ben Elliston <bje@gnu.org>
+
+ * config.guess (set_cc_for_build): Prevent multiple calls by
+ checking if $tmp is already set. We can't check CC_FOR_BUILD as
+ the user may set it externally. Thanks to Torbjörn Granlund for
+ the bug report.
+
+ 2019-12-21 Torbjörn Granlund <tg@gmplib.org>
+
+ * config.guess (alpha:Linux:*:*): Guard against missing
+ /proc/cpuinfo by redirecting standard error to /dev/null.
+
+ 2019-09-12 Daniel Bittman <danielbittman1@gmail.com>
+
+ * config.guess (*:Twizzler:*:*): New.
+ * config.sub (-twizzler*): New.
+
+ 2019-07-24 Ben Elliston <bje@gnu.org>
+
+ * config.guess (mips:OSF1:*.*): Whitespace cleanup.
+
+ 2019-06-30 Ben Elliston <bje@gnu.org>
+
+ * config.sub (case $os): Match nsk* and powerunix. Don't later
+ match nsk* and set os=nsk which removes the OS version number.
+
+ 2019-06-30 Ben Elliston <bje@gnu.org>
+
+ * config.sub: Recognise os108*.
+
+ 2019-06-26 Ben Elliston <bje@gnu.org>
+
+ * config.sub (hp300): Set $os to hpux.
+
+ 2019-06-26 Ben Elliston <bje@gnu.org>
+
+ * config.sub (vsta): Move into alphabetical order.
+
+ 2019-06-10 Ben Elliston <bje@gnu.org>
+
+ * config.guess (*:OS108:*:*): Recognise new OS.
+
+ 2019-05-28 Ben Elliston <bje@gnu.org>
+
+ * config.guess (*:Darwin:*:*): Run xcode-select to determine if a
+ system compiler is installed. If not, do not run set_cc_for_build,
+ as the default cc will open a dialog box asking to install
+ Xcode. If no C compiler is available, guess based on uname -p and
+ uname -m.
+
+ 2019-05-28 Ben Elliston <bje@gnu.org>
+
+ * config.guess (*:Darwin:*:*): Simplify UNAME_PROCESSOR.
+