File chessx-install.patch of Package chessx

Index: chessx-1.5.6-lw/CMakeLists.txt
===================================================================
--- chessx-1.5.6-lw.orig/CMakeLists.txt
+++ chessx-1.5.6-lw/CMakeLists.txt
@@ -12,6 +12,11 @@ option(ENABLE_SOUNDS "Enable sounds (req
 option(ENABLE_TTS "Enable text-to-speech (requires Qt5::TextToSpeech)" ON)
 option(ENABLE_SCID_SUPPORT "Enable support for Scid database format (*.si4)" ON)
 
+if(UNIX AND NOT APPLE)
+  set(LINUX TRUE)
+  include(GNUInstallDirs)
+endif()
+
 add_subdirectory(dep)
 
 # common definitions to use with Qt
@@ -149,3 +154,10 @@ if (ENABLE_TESTING)
   add_subdirectory(tests/unittests)
 endif()
 
+if(LINUX)
+  install(TARGETS chessx DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR})
+  install(FILES unix/chessx.desktop DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/applications)
+  install(FILES data/images/chessx.png DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/pixmaps)
+  install(DIRECTORY data DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/chessx)
+  install(FILES ${TRANSLATIONS_BIN_FILES} DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/chessx/data/lang)
+endif()