+#ifndef INT16SZ
+#define INT16SZ (2)
+#endif
+
+#ifndef HAVE_GMTIME_R
+struct tm *gmtime_r(const time_t *l_clock, struct tm *result);
+#endif
+
+#ifndef HAVE_GETTIMEOFDAY
+int gettimeofday (struct timeval *tv, void *tz);
+#endif
+
+#ifdef WIN32
+#undef interface
+#undef mkdir
+#define mkdir(_d, _p) mkdir(_d)
+#define FR_DIR_SEP '\\'
+#define FR_DIR_IS_RELATIVE(p) ((*p && (p[1] != ':')) || ((*p != '\\') && (*p != '\\')))
+#else
+#define FR_DIR_SEP '/'
+#define FR_DIR_IS_RELATIVE(p) ((*p) != '/')
+#endif
+
+#ifdef HAVE_SYS_LOCKING_H
+#define lockf _locking
+
+#define F_ULOCK _LK_UNLCK /* Unlock locked sections. */
+#define F_LOCK _LK_LOCK /* Lock a section for exclusive use. */
+#define F_TLOCK _LK_NBLCK /* Test and lock a section for exclusive use */
+#define F_TEST _LK_RLCK /* Test section for locks by other processes. */
+#endif
+
+#ifndef offsetof
+# define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif
+
+void timeval2ntp(const struct timeval *tv, uint8_t *ntp);
+void ntp2timeval(struct timeval *tv, const char *ntp);
+
+#ifdef __cplusplus
+}
+#endif
+