gentoo-overlay/net-ftp/lftp/files/lftp-4.9.2-ac-270.patch

--- a/m4/std-gnu11.m4
+++ b/m4/std-gnu11.m4
@@ -6,6 +6,8 @@
 # This implementation will be obsolete once we can assume Autoconf 2.70
 # or later is installed everywhere a Gnulib program might be developed.
 
+m4_version_prereq([2.70], [], [
+
 
 # Copyright (C) 2001-2020 Free Software Foundation, Inc.
 
@@ -70,7 +72,7 @@ _AS_ECHO_LOG([checking for _AC_LANG compiler version])
 set X $ac_compile
 ac_compiler=$[2]
 for ac_option in --version -v -V -qversion -version; do
-  m4_ifdef([_AC_DO_LIMIT],[_AC_DO_LIMIT],[_AC_DO])([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD])
+  _AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD])
 done
 
 m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
@@ -135,7 +137,7 @@ _AS_ECHO_LOG([checking for _AC_LANG compiler version])
 set X $ac_compile
 ac_compiler=$[2]
 for ac_option in --version -v -V -qversion; do
-  m4_ifdef([_AC_DO_LIMIT],[_AC_DO_LIMIT],[_AC_DO])([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD])
+  _AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD])
 done
 
 m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
@@ -822,3 +824,6 @@ dnl Tru64	N/A (no support)
 dnl with extended modes being tried first.
 [[-std=gnu++11 -std=c++11 -std=gnu++0x -std=c++0x -qlanglvl=extended0x -AA]], [$1], [$2])[]dnl
 ])# _AC_PROG_CXX_CXX11
+
+
+])# m4_version_prereq