Missing files in cygwin

I'm missing the following files when I try to make a program i have downloaded using cygwin. Does anyone know a patch or library I could download from开发者_如何学JAVA the cygwin setup interface?

../ports/linux/net.h:78:23: net/route.h: No such file or directory
../ports/linux/net.h:80:24: net/if_arp.h: No such file or directory
../ports/linux/net.h:87:29: linux/if_packet.h: No such file or directory
../ports/linux/net.h:88:29: linux/if_arcnet.h: No such file or directory
../ports/linux/net.h:89:28: linux/if_ether.h: No such file or directory

You can find the answer by searching for any of these file names at the Cygwin package search page.

What you'll find is that they're not there. They're not currently supported in Cygwin.