!!! ERROR: net-wireless/madwifi-ng-0.9.2.1 failed.
Call stack:
  ebuild.sh, line 1596:   Called dyn_setup
  ebuild.sh, line 666:   Called pkg_setup
  madwifi-ng-0.9.2.1.ebuild, line 32:   Called linux-mod_pkg_setup
  linux-mod.eclass, line 458:   Called linux-info_pkg_setup
  linux-info.eclass, line 554:   Called die

!!! Unable to calculate Linux Kernel version
!!! If you need support, post the topmost build error, and the call stack if relevant.