AC_CHECK_HEADER(readline/history.h, [HaveReadlineHistoryH=YES], [HaveReadlineHistoryH=NO])
if test $HaveReadlineReadlineH = YES && test $HaveReadlineHistoryH = YES ; then
AC_CHECK_HEADER(readline/history.h, [HaveReadlineHistoryH=YES], [HaveReadlineHistoryH=NO])
if test $HaveReadlineReadlineH = YES && test $HaveReadlineHistoryH = YES ; then