By default, Gentoo only compiles the GnuTLS libs without tools: /usr/bin/gnutls-cli /usr/bin/gnutls-serv /usr/bin/ocsptool /usr/bin/certtool /usr/bin/srptool /usr/bin/gnutls-cli-debug /usr/bin/psktool In order to compile these, the local USE=tools flag must be set. But only then, net-libs/gnutls[tools] has a BDEPEND on sys-devel/autogen, which in turn has a depend on GUILE. When compiling the default (libs-only), there is no such dependency in the Gentoo emake. Since the default source of GnuTLS (>=3.6.7) does not rely on GUILE/autogen, and its tools can be compiled without GUILE (even setting USE=tools and emerge --nodeps works), this seems to be a bogus dependency and thus be removed.
It seems none of the current ebuilds for net-libs/gnutls have a dependency on sys-devel/autogen. Should this bug be closed?