I have noticed that his patch is missing from the Gentoo portage tree. I have added the latest version, along with patch to support MPPE over EAP-TLS.
Created attachment 71081 [details, diff] Patch that enables ppp 2.4.3-r8 to be built with EAP-TLS
does this patch work for you?
EAP-TLS works. I haven't been able to make the second part of the patch to work: MPPE with EAP-TLS authentification. Working on that now.
your patch cannot be applied even to the original ppp-2.4.3 source, so I've adapted the original ones. ppp-2.4.3-r9 commited to the tree, having a new useflag called eap-tls.