In the src_compile() section of app-crypt/gnupg-1.9.8.ebuild and app-crypt/gnupg-1.9.10.ebuild a variable "myconf" is declared and set under certain circumstances, but it is not considered when calling econf. The two applied patch fixes this (It's the same line in both ebuilds so it could be applied to both)
Created attachment 38437 [details, diff] Patch to add ${myconf} (goes for both 1.9.8 and 1.9.10)
fixed in cvs.