Upstream 0bfb53136 bumped the required qt version to 5.15.0 so the current patch (which has the old 5.14.0 requirement in the context) no longer applies. In bug #760741 you said the final required-version bump to 5.15 was ~6 months out. This must be it, tho only ~4 months later. Patch line 165: s/5.14.0/5.15.0/ Then the patch applies and the package builds again. =:^)
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/proj/kde.git/commit/?id=e7795fc2aa0453a81adc6ee5f2e2b2b101c03f50 commit e7795fc2aa0453a81adc6ee5f2e2b2b101c03f50 Author: Andreas Sturmlechner <asturm@gentoo.org> AuthorDate: 2021-04-05 11:28:55 +0000 Commit: Andreas Sturmlechner <asturm@gentoo.org> CommitDate: 2021-04-05 11:29:07 +0000 kde-frameworks/kdelibs4support: Split no-kdesignerplugin.patch for 9999 File size management. Reported-by: Duncan <1i5t5.duncan@cox.net> Closes: https://bugs.gentoo.org/780360 Package-Manager: Portage-3.0.18, Repoman-3.0.3 Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org> ...delibs4support-5.80.0-no-kdesignerplugin.patch} | 54 ---------------------- .../files/kdelibs4support-5.80.0-unused-dep.patch | 51 ++++++++++++++++++++ .../files/kdelibs4support-5.82.0-unused-dep.patch | 51 ++++++++++++++++++++ .../kdelibs4support/kdelibs4support-5.81.0.ebuild | 5 ++ .../kdelibs4support/kdelibs4support-9999.ebuild | 6 ++- 5 files changed, 112 insertions(+), 55 deletions(-)