#define _SEEK_MAX(fil) \
(_F_LARGEFILE(fil) ? _SYSIO_OFF_T_MAX : LONG_MAX)
-#if _LARGEFILE64_SOURCE
+#ifdef _LARGEFILE64_SOURCE
#define _SYSIO_FLOCK flock64
#else
#define _SYSIO_FLOCK flock
extern int _sysio_fd_set(struct file *fil, int fd, int force);
extern int _sysio_fd_dup(int oldfd, int newfd, int force);
extern int _sysio_fd_close_all(void);
-#if ZERO_SUM_MEMORY
+#ifdef ZERO_SUM_MEMORY
extern void _sysio_fd_shutdown(void);
#endif
extern _SYSIO_OFF_T _sysio_lseek_prepare(struct file *fil,