qca : Qt Cryptographic Architecture (QCA) ( https://userbase.kde.org/QCA )
tpm2-tss : TCG Trusted Platform Module 2.0 Software Stack ( https://github.com/tpm2-software/tpm2-tss )
trousers : An open-source TCG Software Stack (TSS) v1.1 implementation ( http://trousers.sf.net )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a libressl
For Paludis use this rsync : rsync://gentoo.zugaina.org/libressl-portage
If you have a problem : ycarus(-at-)zugaina.org