Remove USE_XRANDR flag from cmake.

Our vidmode code is old, has some bugs (eg. resolution is not restored properly in some cases), doesn't have multi monitor support and IMO shouldn't be used in current state.

If someone really wants to use it, the flags can be set directly in IrrCompileConfig.h.

CMakeLists.txt

@@ -41,7 +41,6 @@ else()
 endif()
 
 if(UNIX AND NOT APPLE)
-    option(USE_XRANDR "Use xrandr instead of vidmode" ON)
     option(USE_ASAN   "Build with Leak/Address sanitizer" OFF)
     option(USE_LIBBFD "Use libbfd for crash reporting and leak check" OFF)
 endif()
@@ -215,15 +214,10 @@ if(UNIX AND NOT APPLE)
     find_package(X11 REQUIRED)
     include_directories(${X11_INCLUDE_DIR})
 
-    if(USE_XRANDR)
     find_package(Xrandr REQUIRED)
     if(NOT XRANDR_FOUND)
         message(FATAL_ERROR "XRANDR not found.")
     endif()
-    else()
-        find_library(IRRLICHT_XF86VM_LIBRARY Xxf86vm)
-        mark_as_advanced(IRRLICHT_XF86VM_LIBRARY)
-    endif()
 
     if(USE_LIBBFD)
         find_package(Libbfd)
@@ -382,12 +376,7 @@ else()
 endif()
 
 if(UNIX AND NOT APPLE)
-    target_link_libraries(supertuxkart ${X11_LIBRARIES})
-    if(USE_XRANDR)
-        target_link_libraries(supertuxkart ${XRANDR_LIBRARIES})
-    else()
-        target_link_libraries(supertuxkart ${IRRLICHT_XF86VM_LIBRARY})
-    endif()
+    target_link_libraries(supertuxkart ${X11_LIBRARIES} ${XRANDR_LIBRARIES})
     if(USE_LIBBFD)
         target_link_libraries(supertuxkart ${LIBBFD_LIBRARIES})
     endif()

lib/irrlicht/CMakeLists.txt

@@ -47,7 +47,7 @@ if(USE_GLES2)
 endif()
 
 # Xrandr
-if(UNIX AND USE_XRANDR)
+if(UNIX AND NOT APPLE)
     add_definitions(-DNO_IRR_LINUX_X11_VIDMODE_)
     add_definitions(-D_IRR_LINUX_X11_RANDR_)
 endif()