version 1.16.4

* configure.ac (AC_INIT): Bump version number to 1.16.4.
* m4/amversion.m4: Likewise (auto-updated by "make bootstrap").
* NEWS: Record release version.

NEWS

diff --git a/NEWS b/NEWS
index d234dc4..bb3e3ae 100644
--- a/NEWS
+++ b/NEWS
@@ -5,6 +5,10 @@
 
 New in ?.?.?:
 
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+New in 1.16.4:
+
 * New features added
 
   - The PYTHON_PREFIX and PYTHON_EXEC_PREFIX variables are now set from

configure.ac

diff --git a/configure.ac b/configure.ac
index d535435..f7656ff 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,7 +16,7 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 AC_PREREQ([2.69])
-AC_INIT([GNU Automake], [1.16e], [bug-automake@gnu.org])
+AC_INIT([GNU Automake], [1.16.4], [bug-automake@gnu.org])
 
 AC_CONFIG_SRCDIR([bin/automake.in])
 AC_CONFIG_AUX_DIR([lib])

m4/amversion.m4

diff --git a/m4/amversion.m4 b/m4/amversion.m4
index ea12b94..e71cdaa 100644
--- a/m4/amversion.m4
+++ b/m4/amversion.m4
@@ -15,7 +15,7 @@
 [am__api_version='1.16'
 dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
 dnl require some minimum version.  Point them to the right macro.
-m4_if([$1], [1.16e], [],
+m4_if([$1], [1.16.4], [],
       [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
 ])
 
@@ -31,7 +31,7 @@
 # Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.
 # This function is AC_REQUIREd by AM_INIT_AUTOMAKE.
 AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
-[AM_AUTOMAKE_VERSION([1.16e])dnl
+[AM_AUTOMAKE_VERSION([1.16.4])dnl
 m4_ifndef([AC_AUTOCONF_VERSION],
   [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
 _AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])