Install icons in $PREFIX/share/icons/hicolor path.

Don't use static paths in .desktop file. Actually I don't know about any application which uses it :P

CMakeLists.txt

@@ -368,10 +368,8 @@ install(DIRECTORY ${STK_DATA_DIR} DESTINATION ${STK_INSTALL_DATA_DIR} PATTERN ".
 if(STK_ASSETS_DIR AND CHECK_ASSETS)
   install(DIRECTORY ${STK_ASSETS_DIR} DESTINATION ${STK_INSTALL_DATA_DIR}/data PATTERN ".svn" EXCLUDE PATTERN ".git" EXCLUDE)
 endif()
-install(FILES ${PROJECT_BINARY_DIR}/supertuxkart.desktop DESTINATION share/applications)
+install(FILES ${STK_DATA_DIR}/supertuxkart.desktop DESTINATION share/applications)
+install(FILES data/supertuxkart_32.png DESTINATION share/icons/hicolor/32x32 RENAME supertuxkart.png)
+install(FILES data/supertuxkart_128.png DESTINATION share/icons/hicolor/128x128 RENAME supertuxkart.png)
 install(FILES data/supertuxkart_32.png data/supertuxkart_128.png DESTINATION share/pixmaps)
 install(FILES data/supertuxkart.appdata DESTINATION share/appdata)
-
-set(PREFIX ${CMAKE_INSTALL_PREFIX})
-configure_file(data/supertuxkart_desktop.template supertuxkart.desktop)
-add_dependencies(supertuxkart supertuxkart.desktop)

data/supertuxkart_desktop.template → data/supertuxkart.desktop

@@ -1,15 +1,14 @@
 [Desktop Entry]
 Name=SuperTuxKart
-Icon=@PREFIX@/share/pixmaps/supertuxkart_128.png
+Icon=supertuxkart
 GenericName=A kart racing game
 GenericName[de]=Ein Kart-Rennspiel
 GenericName[fr]=Un jeu de karting
 GenericName[gl]=Xogo de carreiras con karts
 GenericName[pl]=Wyścigi gokartów
 GenericName[ro]=Un joc de curse cu carturi
-Exec=@PREFIX@/@STK_INSTALL_BINARY_DIR@/supertuxkart --no-console
+Exec=supertuxkart
 Terminal=false
 StartupNotify=false
 Type=Application
-TryExec=@PREFIX@/@STK_INSTALL_BINARY_DIR@/supertuxkart
 Categories=Game;ArcadeGame;