Merge branch 'cmake-share2' into 'master'

cmake: for now do not use CMAKE_INSTALL_DATAROOTDIR for GLOBAL_DATA_PATH

See merge request OpenMW/openmw!1612

CMakeLists.txt

@@ -191,7 +191,7 @@ elseif(UNIX)
     SET(BINDIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Where to install binaries")
     SET(LIBDIR "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}" CACHE PATH "Where to install libraries")
     SET(DATAROOTDIR "${CMAKE_INSTALL_DATAROOTDIR}" CACHE PATH "Sets the root of data directories to a non-default location")
-    SET(GLOBAL_DATA_PATH "${DATAROOTDIR}/games/" CACHE PATH "Set data path prefix")
+    SET(GLOBAL_DATA_PATH "${CMAKE_INSTALL_PREFIX}/share/games/" CACHE PATH "Set data path prefix")
     SET(DATADIR "${GLOBAL_DATA_PATH}/openmw" CACHE PATH "Sets the openmw data directories to a non-default location")
     SET(ICONDIR "${DATAROOTDIR}/pixmaps" CACHE PATH "Set icon dir")
     SET(LICDIR "${DATAROOTDIR}/licenses/openmw" CACHE PATH "Sets the openmw license directory to a non-default location.")