1 files changed, 10 insertions, 0 deletions
diff --git a/NEWS b/NEWS
index 3c50ff8a..818ba1f4 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,10 @@ GNU Autoconf NEWS - User visible changes.
 * Noteworthy changes in release ?.? (????-??-??) [?]
 
 ** Backward incompatibilities
+
+*** Autoconf now requires perl 5.8 (2002) or later.
+  Generated 'configure' scripts continue to run without perl.
+
 ** New features
 ** Obsolete features and new warnings
 
@@ -15,6 +19,12 @@ GNU Autoconf NEWS - User visible changes.
 
 ** Notable bug fixes
 
+*** Autoconf caches now use finer-grained timestamps.
+
+  Autoconf now uses floating-point numbers rather than integers to
+  represent cache file timestamps, thus avoiding some problems where
+  automake incorrectly decides not to regenerate stale caches.
+
 * Noteworthy changes in release 2.71 (2021-01-28) [stable]
 
 ** Bug fixes, including: