for ac_exec_ext in '' $ac_executable_extensions; do
ac_path_FLEX="$as_dir/$ac_prog$ac_exec_ext"
{ test -f "$ac_path_FLEX" && $as_test_x "$ac_path_FLEX"; } || continue
for ac_exec_ext in '' $ac_executable_extensions; do
ac_path_FLEX="$as_dir/$ac_prog$ac_exec_ext"
{ test -f "$ac_path_FLEX" && $as_test_x "$ac_path_FLEX"; } || continue