Under Solaris11 when the legacy configure was used with --with-libtool

--------------------------------------------------------------------
  :
checking for struct msghdr.msg_control... yes
checking for struct tpacket_auxdata.tp_vlan_tci... no
configure: WARNING: legacy configure is used but libtool is enabled. Trying to recover...
./config+lt[20]: autoreconf: not found [No such file or directory]
Reconfiguring with --with-atf=/home/jenkins/opt/atf --enable-libtool
checking for a BSD-compatible install... /usr/bin/ginstall -c
checking whether build environment is sane... yes
 :
--------------------------------------------------------------------

Which fails because autoreconf cannot be found.  The recovery step needs to detect a failure and stop, not loop forever.  We saw a similar issue when the "m4" directory did not exist.