In file included from /usr/include/linux/netdevice.h:28,
                 from /usr/include/linux/if_arp.h:26,
                 from io.c:24:
/usr/include/linux/if.h:95: error: redefinition of ‘struct ifmap’
/usr/include/linux/if.h:131: error: redefinition of ‘struct ifreq’
/usr/include/linux/if.h:181: error: redefinition of ‘struct ifconf’
io.c: In function ‘accept_new’:
io.c:281: warning: pointer targets in passing argument 3 of ‘accept’ differ in signedness
io.c:296: warning: pointer targets in passing argument 5 of ‘getsockopt’ differ in signedness
io.c: In function ‘get_local’:
io.c:618: warning: pointer targets in passing argument 3 of ‘getsockname’ differ in signedness
make[3]: *** [io.o] Error 1
make[3]: Leaving directory `/var/tmp/portage/net-dialup/linux-atm-2.4.1-r1/work/linux-atm-2.4.1/src/arpd'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/var/tmp/portage/net-dialup/linux-atm-2.4.1-r1/work/linux-atm-2.4.1/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/net-dialup/linux-atm-2.4.1-r1/work/linux-atm-2.4.1'
make: *** [all-recursive-am] Error 2

!!! ERROR: net-dialup/linux-atm-2.4.1-r1 failed.
Call stack:
  ebuild.sh, line 1614:   Called dyn_compile
  ebuild.sh, line 971:   Called qa_call 'src_compile'
  environment, line 3301:   Called src_compile
  ebuild.sh, line 645:   Called die

!!! emake failed
!!! If you need support, post the topmost build error, and the call stack if relevant.
!!! A complete build log is located at '/var/tmp/portage/net-dialup/linux-atm-2.4.1-r1/temp/build.log'.