The 'filter design tool' of gnuradio-companion does not show up in standard configuration of net-wireless/gnuradio-3.8.5.0. It needs dev-python/pyqtgraph installed. Afterwards it works fine.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=e13b33ad95a6e3d613bd8d1b31046be4e4c58000 commit e13b33ad95a6e3d613bd8d1b31046be4e4c58000 Author: Thomas Beierlein <tomjbe@gentoo.org> AuthorDate: 2022-06-25 09:24:22 +0000 Commit: Thomas Beierlein <tomjbe@gentoo.org> CommitDate: 2022-06-25 09:28:38 +0000 net-wireless/gnuradio: Add missing dep Bug: https://bugs.gentoo.org/838364 Signed-off-by: Thomas Beierlein <tomjbe@gentoo.org> net-wireless/gnuradio/gnuradio-3.8.5.0-r1.ebuild | 225 +++++++++++++++++++++++ 1 file changed, 225 insertions(+)
Version 3.8.5 is no longer in tree. Problem is solved in actual >=gnuradio-3.10.xx