In the 6.13 ebuild the relevant econf option is explicitly disabled, with a comment that librtlsdr is not in the tree. Fortunately now that we have got net-wireless/rtl-sdr, which provides the aforementioned library, the option in question can now be supported! Shouldn't be too difficult, having manually toggled this option in the ebuild I was able to build a working rngd linked against rtl-sdr-0.6.0-r1 with no problems.
Fancy sharing a git am-able patch?
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=19ecf04f943e610dce9bfebf786249ac6979f52b commit 19ecf04f943e610dce9bfebf786249ac6979f52b Author: Marek Szuba <marecki@gentoo.org> AuthorDate: 2021-08-17 10:05:49 +0000 Commit: Marek Szuba <marecki@gentoo.org> CommitDate: 2021-08-17 10:23:13 +0000 sys-apps/rng-tools: add support for rtlsdr entropy source Closes: https://bugs.gentoo.org/803101 Signed-off-by: Marek Szuba <marecki@gentoo.org> sys-apps/rng-tools/metadata.xml | 3 ++ sys-apps/rng-tools/rng-tools-6.14-r1.ebuild | 69 +++++++++++++++++++++++++++++ 2 files changed, 72 insertions(+)