I've Ubuntu 10.10 and when I compile with gcc (version 4.4) I incur in the following two errors: In file included from main.c:34, from aodv_hello.h:30, from aodv_socket.c:38: /usr/include/linux/if.h:134: error: redefinition of ‘struct ifmap’ /usr/include/linux/if.h:168: error: redefinition of ‘struct ifreq’ /usr/include/linux/if.h:217: error: redefinition of ‘struct ifconf’ In file included from /usr/include/iwlib.h:56, from llf.c:36: /usr/include/net/if.h:45: error: expected identifier before numeric constant /usr/include/net/if.h:113: error: redefinition of ‘struct ifmap’ /usr/include/net/if.h:128: error: redefinition of ‘struct ifreq’ /usr/include/net/if.h:178: error: redefinition of ‘struct ifconf’ As you can observe, these two errors refer both to a SYSTEM FILE /usr/include/net/if.h Note that this error happens also when I try to compile other projects that inclueds the file /usr/include/net/if.h The problem is that I've never modified such file, therefore I don't know how to fix these errors. Has anybody some idea??? -- View this message in context: http://old.nabble.com/Why-errors-in--usr-include-linux-if.h------tp32067300p32067300.html Sent from the gcc - Help mailing list archive at Nabble.com.