This ebuild is still on the EAPI 5, so it doesn't apply user patches by default. I know #515718 already discusses that, but i would argue that you can't configure it fully only in the config.h
Nowadays every ebuilds should aim to allow user patching (and not stay on deprecated EAPI-5), so there's nothing wrong with wanting this regardless of old bug.
Created attachment 698625 [details, diff] tabbed ebuild patch Applying the following patch fixes the issues.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=981c6f1b851d99dfe8b28c3b139b83218175818b commit 981c6f1b851d99dfe8b28c3b139b83218175818b Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2021-04-21 20:23:21 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2021-04-21 20:23:37 +0000 x11-misc/tabbed: drop old Closes: https://bugs.gentoo.org/780909 Package-Manager: Portage-3.0.18, Repoman-3.0.3 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> x11-misc/tabbed/tabbed-0.6.ebuild | 47 --------------------------------------- 1 file changed, 47 deletions(-) Additionally, it has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=59a1c64b51f537094c44481d16e70b66e38f47c3 commit 59a1c64b51f537094c44481d16e70b66e38f47c3 Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2021-04-21 20:22:23 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2021-04-21 20:23:36 +0000 x11-misc/tabbed: bump to EAPI=7 Bug: https://bugs.gentoo.org/780909 Package-Manager: Portage-3.0.18, Repoman-3.0.3 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> x11-misc/tabbed/tabbed-0.6-r1.ebuild | 48 ++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+)