ebuild net-misc/neon/neon-0.25.5.ebuild has hardcoded --without-gssapi (line 51) Hardcoded value makes all dependent client builds such as Subversion 1.3.x fail in environments that mandate single-sign-on using SPNEGO/GSSAPI etc. ALthough changelong for 0.25.5 mentions this however, may be it should depend itself on 'kerberos' USE flag like for other applications like Samba.
I don't see what's unclear about the changelog entry. It's broken, so it's disabled. <snip> 23 Dec 2005; Paul de Vrieze <pauldv@gentoo.org> neon-0.25.3.ebuild: Explicitly disable linking with gssapi. Autodetecting gives a broken dependency. Using a useflag dependency doesn't work as apparently the libtool archive created does not have proper dependencies. </snip>
*** Bug 159303 has been marked as a duplicate of this bug. ***