extern struct perf_tool build_id__mark_dso_hit_ops;
struct dso;
+char *build_id__filename(const char *sbuild_id, char *bf, size_t size);
int build_id__sprintf(const u8 *build_id, int len, char *bf);
int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id);
int filename__sprintf_build_id(const char *pathname, char *sbuild_id);