clamav's ebuild has a useflag, crypt, to decide whether or not to DEPEND on dev-libs/gmp. However, there is no corresponding $(use_enable crypt dsig) inside of clamav-0.94*.ebuild. the --disable-dsig configure option should be passed to prevent clamav-0.94[-crypt] from linking with gmp.
All 0.94* ebuilds are removed.