# -DMAJOR_IN_SYSMACROS If major, minor, makedev defined in sys/sysmacros.h.
# -DRETSIGTYPE=int If your signal handlers return int, not void.
# -DHAVE_SYS_MTIO_H If you have sys/mtio.h (magtape ioctls).
+# -DHAVE_SYS_GENTAPE_H If you have sys/gentape.h (ISC magtape ioctls).
# -DHAVE_NETDB_H To use rexec for remote tape operations
# instead of forking rsh or remsh.
# -DNO_REMOTE If you have neither a remote shell nor rexec.
# -DHAVE_STRSTR If you have strstr function.
# -DHAVE_VALLOC If you have valloc function.
# -DHAVE_MKDIR If you have mkdir and rmdir system calls.
+# -DHAVE_MKNOD If you have mknod system call.
# -DHAVE_RENAME If you have rename system call.
# -DHAVE_FTRUNCATE If you have ftruncate system call.
# -DV7 On Version 7 Unix (not tested in a long time).