Make all the defines in config.h be override-able by the build system

src/platforms/rcore_desktop_sdl.c

@@ -1107,7 +1107,7 @@ Image GetClipboardImage(void)
 {
     Image image = { 0 };
 
-#if defined(SUPPORT_CLIPBOARD_IMAGE)
+#if SUPPORT_CLIPBOARD_IMAGE
     // Let's hope compiler put these arrays in static memory
     const char *imageFormats[] = {
         "image/bmp",
@@ -1311,7 +1311,7 @@ static void UpdateTouchPointsSDL(SDL_TouchFingerEvent event)
 // Register all input events
 void PollInputEvents(void)
 {
-#if defined(SUPPORT_GESTURES_SYSTEM)
+#if SUPPORT_GESTURES_SYSTEM
     // NOTE: Gestures update must be called every frame to reset gestures correctly
     // because ProcessGestureEvent() is just called on an event, not every frame
     UpdateGestures();
@@ -1737,7 +1737,7 @@ void PollInputEvents(void)
             default: break;
         }
 
-#if defined(SUPPORT_GESTURES_SYSTEM)
+#if SUPPORT_GESTURES_SYSTEM
         if (touchAction > -1)
         {
             // Process mouse events as touches to be able to use mouse-gestures
@@ -1939,7 +1939,7 @@ int InitPlatform(void)
     // NOTE: No need to call InitTimer(), let SDL manage it internally
     CORE.Time.previous = GetTime();     // Get time as double
 
-    #if defined(_WIN32) && defined(SUPPORT_WINMM_HIGHRES_TIMER) && !defined(SUPPORT_BUSY_WAIT_LOOP)
+    #if defined(_WIN32) && SUPPORT_WINMM_HIGHRES_TIMER && !SUPPORT_BUSY_WAIT_LOOP
     SDL_SetHint(SDL_HINT_TIMER_RESOLUTION, "1"); // SDL equivalent of timeBeginPeriod() and timeEndPeriod()
     #endif
     //----------------------------------------------------------------------------