diff -urNp -x '*.orig' glibc-2.33.org/aclocal.m4 glibc-2.33/aclocal.m4
--- glibc-2.33.org/aclocal.m4	2021-02-01 18:15:33.000000000 +0100
+++ glibc-2.33/aclocal.m4	2021-03-20 14:28:43.059826328 +0100
@@ -3,11 +3,6 @@ dnl the internal functions defined and u
 dnl match those expected by the fragments.  When changing this version,
 dnl install.texi also needs to be updated.
 m4_define([GLIBC_AUTOCONF_VERSION], [2.69])
-m4_if(m4_defn([AC_AUTOCONF_VERSION]), GLIBC_AUTOCONF_VERSION, [],
-      [m4_fatal(m4_flatten(
-Exactly version GLIBC_AUTOCONF_VERSION of Autoconf is required but you have
-m4_defn([AC_AUTOCONF_VERSION])
-), [63])])dnl
 dnl
 dnl We define the macro GLIBC_PROVIDES to do an AC_PROVIDE for each macro
 dnl which appears in configure.ac before the sysdep configure scripts are run.