In the attachment is a trivial patch for tcpdump-4.2.1 to work on Gentoo Prefix. Please review. Reproducible: Always
Created attachment 308931 [details, diff] tcpdump-4.2.1.patch
Benda, this is a bug since the ebuild has Gentoo Prefix keywords but the configure options look outside the prefix. Anyway, patch looks fine, just commit it due to above reason.
commited. Thanks darkside.