These simple patches will help to compile x11-themes/qt5-style-plugins with devel/qt5 version 5.15.0 https://forums.freebsd.org/threads/qt5-style-plugins-patch-to-install-with-qt-5-15-0.76084/
Created attachment 216314 [details] modification of qgtkstyle.cpp based on QT_VERSION
Created attachment 216315 [details] modification of qgtkstyle_p.cpp based on QT_VERSION
Committed, thanks.
A commit references this bug: Author: tcberner Date: Wed Jul 8 07:08:08 UTC 2020 New revision: 541466 URL: https://svnweb.freebsd.org/changeset/ports/541466 Log: x11-themes/qt5-style-plugins: fix build against Qt5.15 - patches obtained from Suse via arch PR: 247841 Submitted by: rewest <rewestwork@gmail.com> Changes: head/x11-themes/qt5-style-plugins/Makefile head/x11-themes/qt5-style-plugins/files/ head/x11-themes/qt5-style-plugins/files/patch-fix_build_against_qt5.15