kwin: cmake cleanup of host-path Qt6Plugin targets (incomplete)

- Delete QmlPlugins dirs and stub PluginTargets files
- Blocked: Qt6Plugin cmake files reference host paths from QT_HOST_PATH
- Needs qtbase recipe cmake config regeneration for cross-build sysroot

local/recipes/kde/kwin/recipe.toml

@@ -60,6 +60,13 @@ sed -i '/include(ECMQmlModule)/s/^/#/' "${COOKBOOK_SOURCE}/CMakeLists.txt" 2>/de
 rm -f CMakeCache.txt
 rm -rf CMakeFiles
 
+# Qt cmake plugin targets reference host paths (not available in cross-build sysroot)
+find "${COOKBOOK_SYSROOT}" -type d -name "QmlPlugins" -exec rm -rf {} + 2>/dev/null || true
+# Stub out Qt6Plugin cmake files that reference host paths
+for f in $(find "${COOKBOOK_SYSROOT}" -name "*PluginTargets.cmake" -o -name "*PluginTargets-*.cmake" -o -name "*PluginTargetsPrecheck.cmake" -o -name "*PluginAdditionalTargetInfo.cmake" 2>/dev/null); do
+    echo "# stub" > "$f"
+done
+
 cmake "${COOKBOOK_SOURCE}" \
     -DCMAKE_TOOLCHAIN_FILE="${COOKBOOK_ROOT}/local/recipes/qt/redox-toolchain.cmake" \
     -DQT_HOST_PATH="${HOST_BUILD}" \