Hack to make the C++11 override keyword work with old compilers.

CMakeLists.txt

@@ -3,6 +3,7 @@ cmake_policy(SET CMP0011 OLD)
 
 include(CheckCXXCompilerFlag)
 include(FindPkgConfig)
+include(cmake/C++11Compat.cmake)
 include(cmake/Summary.cmake)
 include(cmake/Version.cmake)
 include(cmake/Deb.cmake)

cmake/C++11Compat.cmake

@@ -0,0 +1,9 @@
+# Hacky stuff to make C++11 features work with old compilers.
+
+if (CMAKE_COMPILER_IS_GNUCC)
+  execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion
+                  OUTPUT_VARIABLE GCC_VERSION)
+  if (GCC_VERSION VERSION_LESS 4.7)
+    add_definitions(-Doverride=)
+  endif()
+endif()

src/internet/spotifyservice.h

@@ -56,7 +56,7 @@ class SpotifyService : public InternetService {
   void ShowContextMenu(const QPoint& global_pos);
   void ItemDoubleClicked(QStandardItem* item);
   void DropMimeData(const QMimeData* data, const QModelIndex& index);
-  QList<QAction*> playlistitem_actions(const Song& song);
+  QList<QAction*> playlistitem_actions(const Song& song) override;
   QWidget* HeaderWidget() const;
 
   void Logout();