|| ( >=dev-libs/openssl-0.9.8[-bindist] dev-libs/libgcrypt:0= ) := in || is forbidden and broken, and this dependency is seriously wrong. Please either put some USE flags to control this, use only one of the libs or drop the old version altogether.
Oh nice, we can't actually wipe the version since it's the only stable and the only visible version.
commit 8e299dd8da5761999b9fd20e7151ccb527dde026 Author: Michał Górny <mgorny@gentoo.org> AuthorDate: Sun Jun 19 08:37:36 2016 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: Sun Jun 19 08:37:42 2016 net-libs/libzrtpcpp: Remove libgcrypt fallback support, #586320 Remove the libgcrypt fallback support since it can not be expressed correctly with the currently available dependency specifications.