autoconf warning cleanup
- configure: Use
LT_INIT
from libtool 2 instead of deprecatedAC_PROG_LIBTOOL
- configure: pass
noyywrap
toAC_PROG_LEX
if using autoconf 2.70 or later
Raises minimum autoconf version from 2.60 to 2.64 for m4_version_prereq
Edited by Alan Coopersmith