kde-frameworks/kdbusaddons: Add missing dev-qt/qtbase:6= slot op

See also:
https://invent.kde.org/frameworks/kdbusaddons/-/merge_requests/49

Backporting to 6.0.0, otherwise this dependency fix would only be
introduced by 6.1.0 on April 13th.

Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

kde-frameworks/kdbusaddons/files/kdbusaddons-6.0.0-cmake.patch

@@ -0,0 +1,35 @@
+From d307f232232de6e5646fd6a91053fe097b90b35f Mon Sep 17 00:00:00 2001
+From: Andreas Sturmlechner <asturm@gentoo.org>
+Date: Fri, 15 Mar 2024 14:26:49 +0100
+Subject: [PATCH] Conditionalise Qt6::GuiPrivate on HAVE_X11
+
+qtx11extras_p.h is already conditional behind HAVE_X11
+
+Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>
+---
+ src/CMakeLists.txt | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index c47bc15..de5ac6f 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -60,11 +60,11 @@ ecm_generate_export_header(KF6DBusAddons
+     EXCLUDE_DEPRECATED_BEFORE_AND_AT ${EXCLUDE_DEPRECATED_BEFORE_AND_AT}
+ )
+ 
+-if(TARGET Qt6::Gui)
+-    set(_qt_x11_extras_libs Qt6::GuiPrivate) # qtx11extras_p.h
+-endif()
++target_link_libraries(KF6DBusAddons PUBLIC Qt6::DBus)
+ 
+-target_link_libraries(KF6DBusAddons PUBLIC Qt6::DBus PRIVATE ${_qt_x11_extras_libs})
++if(HAVE_X11)
++    target_link_libraries(KF6DBusAddons PRIVATE Qt6::GuiPrivate) # qtx11extras_p.h
++endif()
+ 
+ target_include_directories(KF6DBusAddons INTERFACE "$<INSTALL_INTERFACE:${KDE_INSTALL_INCLUDEDIR_KF}/KDBusAddons>")
+ 
+-- 
+GitLab
+

kde-frameworks/kdbusaddons/kdbusaddons-6.0.0-r1.ebuild

@@ -13,13 +13,16 @@ LICENSE="LGPL-2+"
 KEYWORDS="~amd64"
 IUSE="X"
 
+# slot op: Uses Qt6::GuiPrivate for qtx11extras_p.h
 DEPEND="
 	>=dev-qt/qtbase-${QTMIN}:6[dbus]
-	X? ( >=dev-qt/qtbase-${QTMIN}:6[gui] )
+	X? ( >=dev-qt/qtbase-${QTMIN}:6=[gui] )
 "
 RDEPEND="${DEPEND}"
 BDEPEND=">=dev-qt/qttools-${QTMIN}:6[linguist]"
 
+PATCHES=( "${FILESDIR}/${P}-cmake.patch" )
+
 src_configure() {
 	local mycmakeargs=(
 		-DWITH_X11=$(usex X)