#define HC_IGNBOTH (HC_IGNSPACE|HC_IGNDUPS)
extern int remember_on_history;
+extern int enable_history_list; /* value for `set -o history' */
+extern int literal_history; /* controlled by `shopt lithist' */
+extern int force_append_history;
extern int history_lines_this_session;
extern int history_lines_in_file;
extern int history_expansion;