extern int _rl_completion_prefix_display_length;
extern int _rl_print_completions_horizontally;
-EXTERN_C int _rl_qsort_string_compare (const void *, const void *);
+extern "C" int _rl_qsort_string_compare (const void *, const void *);
typedef int QSFUNC (const void *, const void *);
/* GDB version of readline/complete.c:rl_display_match_list.