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Alan Coopersmith authored
Raises minimum autoconf version from 2.60 to 2.64 for m4_version_prereq Clears autoconf warning: configure.ac:47: warning: AC_PROG_LEX without either yywrap or noyywrap is obsolete ./lib/autoconf/programs.m4:743: _AC_PROG_LEX is expanded from... ./lib/autoconf/programs.m4:736: AC_PROG_LEX is expanded from... configure.ac:47: the top level Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>