--- /dev/null
+diff -ur postgresql-11.15.orig/configure.in postgresql-11.15/configure.in
+--- postgresql-11.15.orig/configure.in 2022-02-07 22:20:23.000000000 +0100
++++ postgresql-11.15/configure.in 2022-04-04 18:20:38.577482081 +0200
+@@ -19,10 +19,6 @@
+
+ AC_INIT([PostgreSQL], [11.15], [pgsql-bugs@postgresql.org])
+
+-m4_if(m4_defn([m4_PACKAGE_VERSION]), [2.69], [], [m4_fatal([Autoconf version 2.69 is required.
+-Untested combinations of 'autoconf' and PostgreSQL versions are not
+-recommended. You can remove the check from 'configure.in' but it is then
+-your responsibility whether the result works or not.])])
+ AC_COPYRIGHT([Copyright (c) 1996-2018, PostgreSQL Global Development Group])
+ AC_CONFIG_SRCDIR([src/backend/access/common/heaptuple.c])
+ AC_CONFIG_AUX_DIR(config)