Move G5 to cpp

Marlin/src/Marlin.cpp

  * ***************************************************************************
  */
 
-#if ENABLED(BEZIER_CURVE_SUPPORT)
-  void plan_cubic_move(const float offset[4]);
-#endif
-
 #if ENABLED(DIGIPOT_I2C)
   extern void digipot_i2c_set_current(uint8_t channel, float current);
   extern void digipot_i2c_init();
  ***************** GCode Handlers *****************
  **************************************************/
 
-#if ENABLED(BEZIER_CURVE_SUPPORT)
-  #include "gcode/motion/G5.h"
-#endif
-
 #if ENABLED(NOZZLE_CLEAN_FEATURE)
   #include "gcode/feature/clean/G12.h"
 #endif

Marlin/src/gcode/gcode.cpp

 //
 // Placeholders for non-migrated codes
 //
-extern void gcode_G5();
 extern void gcode_G12();
 extern void gcode_G17();
 extern void gcode_G18();
 
       #if ENABLED(BEZIER_CURVE_SUPPORT)
         case 5: // G5: Cubic B_spline
-          gcode_G5();
+          G5();
           break;
       #endif // BEZIER_CURVE_SUPPORT
 

Marlin/src/gcode/motion/G5.h → Marlin/src/gcode/motion/G5.cpp

  *
  */
 
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(BEZIER_CURVE_SUPPORT)
+
+#include "../../module/motion.h"
 #include "../../module/planner_bezier.h"
-#include "../../gcode/gcode.h"
 
 void plan_cubic_move(const float offset[4]) {
   cubic_b_spline(current_position, destination, offset, MMS_SCALED(feedrate_mm_s), active_extruder);
  * parameters can be omitted and default to zero.
  */
 
+#include "../gcode.h"
+#include "../../Marlin.h" // for IsRunning()
+
 /**
  * G5: Cubic B-spline
  */
-void gcode_G5() {
+void GcodeSuite::G5() {
   if (IsRunning()) {
 
     #if ENABLED(CNC_WORKSPACE_PLANES)
       }
     #endif
 
-    gcode.get_destination_from_command();
+    get_destination_from_command();
 
     const float offset[] = {
       parser.linearval('I'),
     plan_cubic_move(offset);
   }
 }
+
+#endif // BEZIER_CURVE_SUPPORT