Reverted to QT5 and added QT6 as module

net.retrodeck.retrodeck.yml

@@ -1,9 +1,7 @@
 app-id: net.retrodeck.retrodeck
 runtime: org.kde.Platform
-#runtime-version: 5.15-21.08
-runtime-version:
-  - 5.15-21.08
-  - 6.3                                     # bumped because of pcsx2-qt
+runtime-version: 5.15-21.08
+#runtime-version: 6.3                        # bumped because of pcsx2-qt
 sdk: org.kde.Sdk
 sdk-extensions:
   - org.freedesktop.Sdk.Extension.llvm13    # Needed for rpcs3
@@ -107,6 +105,34 @@ modules:
       - ln -s "xml" "${FLATPAK_DEST}/bin/xmlstarlet" ||:
     cleanup: ['*']
 
+  # pcsx2-qt needs QT6, maybe others, here until every qt emulator will support qt6 (not yuzu atm)
+  - name: qt6-core5compat
+    buildsystem: cmake-ninja
+    builddir: true
+    sources:
+      - type: archive
+        url: https://download.qt.io/official_releases/qt/6.2/6.2.4/submodules/qt5compat-everywhere-src-6.2.4.tar.xz
+        sha256: 5de2b9e25bf7de161fbb88ecdd468ed1788bc899392fc05ed80aa590ebb352fa
+        x-checker-data:
+          type: html
+          url: https://download.qt.io/official_releases/qt/6.2/
+          version-pattern: '>([\d\.-]*)/<'
+          url-template: https://download.qt.io/official_releases/qt/6.2/$version/submodules/qt5compat-everywhere-src-$version.tar.xz
+
+    post-install:
+      - mv /app/mkspecs /app/lib
+      - ln -sr ${FLATPAK_DEST}/lib/${FLATPAK_ARCH}-linux-gnu/libQt*.so* -t ${FLATPAK_DEST}/lib/
+      - sed -i 's/\\([0-9]\\+\\.[0-9]\\+\\)\\.[0-9]\\+ ${_Qt6.*_FIND_VERSION_EXACT}/\\1/'
+        ${FLATPAK_DEST}/lib/${FLATPAK_ARCH}-linux-gnu/cmake/Qt6*/Qt6*Config.cmake
+      - sed -e 's@PATHS \"${CMAKE_CURRENT_LIST_DIR}/..\" NO_DEFAULT_PATH@PATHS \"${CMAKE_CURRENT_LIST_DIR}/..\"
+        \"/usr/lib/${CMAKE_CXX_LIBRARY_ARCHITECTURE}/cmake/\" NO_DEFAULT_PATH@' -i
+        ${FLATPAK_DEST}/lib/${FLATPAK_ARCH}-linux-gnu/cmake/Qt6*/Qt6*Config.cmake
+      - sed -e 's@\\($$QT_MODULE_BIN_BASE\\)@\\1 '${FLATPAK_DEST}'/bin @' -i ${FLATPAK_DEST}/lib/mkspecs/modules/*.pri
+      - sed -e 's@\\($$QT_MODULE_INCLUDE_BASE \\)@\\1'${FLATPAK_DEST}'/include @'
+        -i ${FLATPAK_DEST}/lib/mkspecs/modules/*.pri
+      - sed -e 's@$$QT_MODULE_INCLUDE_BASE/@'${FLATPAK_DEST}'/include/@g' -i ${FLATPAK_DEST}/lib/mkspecs/modules/*.pri
+      - sed -e 's@$$QT_MODULE_LIB_BASE@'${FLATPAK_DEST}'/lib@g' -i ${FLATPAK_DEST}/lib/mkspecs/modules/*.pri
+
   # mesa repo got a double certificate issue and gnutils cannot handle that so GLU download fails,
   # this affects even the shared-modules's glu so I have to replace it temporarly
   # more info there: https://gitlab.com/gnutls/gnutls/-/issues/1335