+let index_empty_texts = ref true
+let sample_factor = ref 64
+let disable_text_collection = ref false
+let tc_threshold = ref 60000
+
+let query = ref ""
+let input_file = ref ""
+let output_file : string option ref = ref None
+let save_file = ref ""
+let count_only = ref false
+let time = ref false
+let bottom_up = ref false
+let no_jump = ref false
+let no_cache = ref false
+let verbose = ref false
+let text_index_type = ref 0
+let do_perf = ref false
+let twopass = ref false
+let repeat = ref 1
+let docstats = ref false
+let no_wrap_results = ref false