pkg syscall (darwin-386), const IFT_DS3 = 30
pkg syscall (darwin-386), const IFT_ENC = 244
pkg syscall (darwin-386), const IFT_EON = 25
pkg syscall (darwin-386), const IFT_ETHER = 6
pkg syscall (darwin-386), const IFT_FAITH = 56
pkg syscall (darwin-386), const IFT_FDDI = 15
pkg syscall (darwin-386), const IFT_FRELAY = 32
pkg syscall (darwin-386), const IFT_FRELAYDCE = 44
pkg syscall (darwin-386), const IFT_GIF = 55

pkg syscall (darwin-386), const IFT_ENC ideal-int
pkg syscall (darwin-386), const IFT_EON ideal-int
pkg syscall (darwin-386), const IFT_ETHER ideal-int
pkg syscall (darwin-386), const IFT_FAITH ideal-int
pkg syscall (darwin-386), const IFT_FDDI ideal-int
pkg syscall (darwin-386), const IFT_FRELAY ideal-int
pkg syscall (darwin-386), const IFT_FRELAYDCE ideal-int
pkg syscall (darwin-386), const IFT_GIF ideal-int

that uses the facility (other than as an argument passed when the
facility is invoked), then you may convey a copy of the modified
version:

   a) under this License, provided that you make a good faith effort to
   ensure that, in the event an Application does not supply the
   function or data, the facility still operates, and performs
   whatever part of its purpose remains meaningful, or