in the portage is not the latest version of the net-firewall/xtables-addons but new ones version of the kernel with net-firewall/xtables-addons-1.39 does not compile. The new version has the following changes - attachment:changelog.diff
Created attachment 314619 [details, diff] changes after 1.39
Created attachment 314621 [details, diff] diff between the xtables-addons-1.39.ebuild and xtables-addons-1.42.ebuild
*** This bug has been marked as a duplicate of bug 397749 ***