🎨 Move HAS_EXTRUDERS

Marlin/src/feature/powerloss.cpp

       #endif
     #endif
 
-    #if EXTRUDERS
+    #if HAS_EXTRUDERS
       HOTEND_LOOP() info.target_temperature[e] = thermalManager.degTargetHotend(e);
     #endif
 

Marlin/src/gcode/config/M221.cpp

 #include "../gcode.h"
 #include "../../module/planner.h"
 
-#if EXTRUDERS
+#if HAS_EXTRUDERS
 
 /**
  * M221: Set extrusion percentage (M221 T0 S95)

Marlin/src/gcode/gcode.cpp

         case 100: M100(); break;                                  // M100: Free Memory Report
       #endif
 
-      #if EXTRUDERS
+      #if HAS_EXTRUDERS
         case 104: M104(); break;                                  // M104: Set hot end temperature
         case 109: M109(); break;                                  // M109: Wait for hotend temperature to reach target
       #endif
       #endif
       case 81: M81(); break;                                      // M81: Turn off Power, including Power Supply, if possible
 
-      case 82: M82(); break;                                      // M82: Set E axis normal mode (same as other axes)
-      case 83: M83(); break;                                      // M83: Set E axis relative mode
+      #if HAS_EXTRUDERS
+        case 82: M82(); break;                                    // M82: Set E axis normal mode (same as other axes)
+        case 83: M83(); break;                                    // M83: Set E axis relative mode
+      #endif
       case 18: case 84: M18_M84(); break;                         // M18/M84: Disable Steppers / Set Timeout
       case 85: M85(); break;                                      // M85: Set inactivity stepper shutdown timeout
       case 92: M92(); break;                                      // M92: Set the steps-per-unit for one or more axes
 
       case 220: M220(); break;                                    // M220: Set Feedrate Percentage: S<percent> ("FR" on your LCD)
 
-      #if EXTRUDERS
+      #if HAS_EXTRUDERS
         case 221: M221(); break;                                  // M221: Set Flow Percentage
       #endif
 

Marlin/src/gcode/gcode.h

   #if ENABLED(PSU_CONTROL)
     static void M80();
   #endif
-
   static void M81();
-  static void M82();
-  static void M83();
+
+  #if HAS_EXTRUDERS
+    static void M82();
+    static void M83();
+  #endif
+
   static void M85();
   static void M92();
 
     static void M100();
   #endif
 
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     static void M104();
     static void M109();
   #endif
 
   static void M220();
 
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     static void M221();
   #endif
 

Marlin/src/gcode/host/M360.cpp

 #include "../../module/motion.h"
 #include "../../module/planner.h"
 
-#if EXTRUDERS
+#if HAS_EXTRUDERS
   #include "../../module/temperature.h"
 #endif
 
   // Per-Extruder settings
   //
   config_line(PSTR("NumExtruder"), EXTRUDERS);
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     LOOP_L_N(e, EXTRUDERS) {
       config_line_e(e, JERK_STR, TERN(HAS_LINEAR_E_JERK, planner.max_e_jerk[E_INDEX_N(e)], TERN(HAS_CLASSIC_JERK, planner.max_jerk.e, DEFAULT_EJERK)));
       config_line_e(e, PSTR("MaxSpeed"), planner.settings.max_feedrate_mm_s[E_AXIS_N(e)]);

Marlin/src/gcode/temp/M104_M109.cpp

 
 #include "../../inc/MarlinConfigPre.h"
 
-#if EXTRUDERS
+#if HAS_EXTRUDERS
 
 #include "../gcode.h"
 #include "../../module/temperature.h"

Marlin/src/gcode/units/M82_M83.cpp

  *
  */
 
+#include "../../inc/MarlinConfigPre.h"
+
+#if HAS_EXTRUDERS
+
 #include "../gcode.h"
 
 /**
  * M83: Set E codes relative while in Absolute Coordinates (G90) mode
  */
 void GcodeSuite::M83() { set_e_relative(); }
+
+#endif // HAS_EXTRUDERS

Marlin/src/inc/Conditionals_LCD.h

  *  E_MANUAL     - Number of E steppers for LCD move options
  */
 
-#if EXTRUDERS == 0
+#if EXTRUDERS
+  #define HAS_EXTRUDERS 1
+  #if EXTRUDERS > 1
+    #define HAS_MULTI_EXTRUDER 1
+  #endif
+#else
   #undef EXTRUDERS
   #define EXTRUDERS 0
   #undef SINGLENOZZLE
   #undef SWITCHING_NOZZLE
   #undef MIXING_EXTRUDER
   #undef HOTEND_IDLE_TIMEOUT
-#elif EXTRUDERS > 1
-  #define HAS_MULTI_EXTRUDER 1
 #endif
 
 #if ENABLED(SWITCHING_EXTRUDER)   // One stepper for every two EXTRUDERS
  * All the logical axes that can be commanded directly by G-code.
  * Delta maps stepper-specific values to ABC steppers.
  */
-#if EXTRUDERS
+#if HAS_EXTRUDERS
   #define LOGICAL_AXES INCREMENT(LINEAR_AXES)
 #else
   #define LOGICAL_AXES LINEAR_AXES

Marlin/src/inc/Conditionals_adv.h

   #define SERVO_DELAY { 50 }
 #endif
 
-#if EXTRUDERS == 0
+#if !HAS_EXTRUDERS
   #define NO_VOLUMETRICS
   #undef TEMP_SENSOR_0
   #undef TEMP_SENSOR_1

Marlin/src/inc/SanityCheck.h

 #endif
 
 #if ENABLED(G26_MESH_VALIDATION)
-  #if !EXTRUDERS
+  #if !HAS_EXTRUDERS
     #error "G26_MESH_VALIDATION requires at least one extruder."
   #elif !HAS_MESH
     #error "G26_MESH_VALIDATION requires MESH_BED_LEVELING, AUTO_BED_LEVELING_BILINEAR, or AUTO_BED_LEVELING_UBL."

Marlin/src/lcd/HD44780/marlinui_HD44780.cpp

             else
           #endif
             {
-              #if EXTRUDERS
+              #if HAS_EXTRUDERS
                 c = 'E';
                 per = planner.flow_percentage[0];
               #endif

Marlin/src/lcd/extui/dgus/DGUSScreenHandler.cpp

 }
 
 void DGUSScreenHandler::HandleFlowRateChanged(DGUS_VP_Variable &var, void *val_ptr) {
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     uint16_t newvalue = swap16(*(uint16_t*)val_ptr);
     uint8_t target_extruder;
     switch (var.VP) {

Marlin/src/lcd/menu/menu_info.cpp

 
   START_SCREEN();
 
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     #define THERMISTOR_ID TEMP_SENSOR_0
     #include "../thermistornames.h"
     STATIC_ITEM_P(PSTR(LCD_STR_E0 ": " THERMISTOR_NAME), SS_INVERT);
     PSTRING_ITEM(MSG_INFO_MAX_TEMP, STRINGIFY(HEATER_7_MAXTEMP), SS_LEFT);
   #endif
 
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     STATIC_ITEM(TERN(WATCH_HOTENDS, MSG_INFO_RUNAWAY_ON, MSG_INFO_RUNAWAY_OFF), SS_LEFT);
   #endif
 
   #else
     SUBMENU(MSG_INFO_PRINTER_MENU, menu_info_printer);           // Printer Info >
     SUBMENU(MSG_INFO_BOARD_MENU, menu_info_board);               // Board Info >
-    #if EXTRUDERS
+    #if HAS_EXTRUDERS
       SUBMENU(MSG_INFO_THERMISTOR_MENU, menu_info_thermistors);  // Thermistors >
     #endif
   #endif

Marlin/src/lcd/menu/menu_tune.cpp

   //
   // Flow:
   //
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     EDIT_ITEM(int3, MSG_FLOW, &planner.flow_percentage[active_extruder], 10, 999, []{ planner.refresh_e_factor(active_extruder); });
     // Flow En:
     #if HAS_MULTI_EXTRUDER

Marlin/src/module/motion.cpp

   planner.buffer_line(current_position, fr_mm_s, active_extruder);
 }
 
-#if EXTRUDERS
+#if HAS_EXTRUDERS
   void unscaled_e_move(const_float_t length, const_feedRate_t fr_mm_s) {
     TERN_(HAS_FILAMENT_SENSOR, runout.reset());
     current_position.e += length / planner.e_factor[active_extruder];
   const uint16_t old_pct = feedrate_percentage;
   feedrate_percentage = 100;
 
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     const float old_fac = planner.e_factor[active_extruder];
     planner.e_factor[active_extruder] = 1.0f;
   #endif
 
   feedrate_mm_s = old_feedrate;
   feedrate_percentage = old_pct;
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     planner.e_factor[active_extruder] = old_fac;
   #endif
 }

Marlin/src/module/motion.h

  */
 void line_to_current_position(const_feedRate_t fr_mm_s=feedrate_mm_s);
 
-#if EXTRUDERS
+#if HAS_EXTRUDERS
   void unscaled_e_move(const_float_t length, const_feedRate_t fr_mm_s);
 #endif
 

Marlin/src/module/planner.cpp

   xyze_bool_t Planner::last_page_dir{0};
 #endif
 
-#if EXTRUDERS
+#if HAS_EXTRUDERS
   int16_t Planner::flow_percentage[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(100); // Extrusion factor for each extruder
   float Planner::e_factor[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(1.0f); // The flow percentage and volumetric multiplier combine to scale E movement
 #endif
                 db = target.b - position.b,
                 dc = target.c - position.c;
 
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     int32_t de = target.e - position.e;
   #else
     constexpr int32_t de = 0;
       " A:", target.a, " (", da, " steps)"
       " B:", target.b, " (", db, " steps)"
       " C:", target.c, " (", dc, " steps)"
-      #if EXTRUDERS
+      #if HAS_EXTRUDERS
         " E:", target.e, " (", de, " steps)"
       #endif
     );
   #endif
   if (de < 0) SBI(dm, E_AXIS);
 
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     const float esteps_float = de * e_factor[extruder];
     const uint32_t esteps = ABS(esteps_float) + 0.5f;
   #else
     steps_dist_mm.c = dc * steps_to_mm[C_AXIS];
   #endif
 
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     steps_dist_mm.e = esteps_float * steps_to_mm[E_AXIS_N(extruder)];
   #else
     steps_dist_mm.e = 0.0f;
 
   if (block->steps.a < MIN_STEPS_PER_SEGMENT && block->steps.b < MIN_STEPS_PER_SEGMENT && block->steps.c < MIN_STEPS_PER_SEGMENT) {
     block->millimeters = (0
-      #if EXTRUDERS
+      #if HAS_EXTRUDERS
         + ABS(steps_dist_mm.e)
       #endif
     );
     TERN_(BACKLASH_COMPENSATION, backlash.add_correction_steps(da, db, dc, dm, block));
   }
 
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     block->steps.e = esteps;
   #endif
 
   #endif
 
   // Enable extruder(s)
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     if (esteps) {
       TERN_(AUTO_POWER_CONTROL, powerManager.power_on());
 
   }
 
   // Limit speed on extruders, if any
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     {
       current_speed.e = steps_dist_mm.e * inverse_secs;
       #if HAS_MIXER_SYNC_CHANNEL

Marlin/src/module/planner.h

       static xyze_bool_t last_page_dir;             // Last page direction given
     #endif
 
-    #if EXTRUDERS
+    #if HAS_EXTRUDERS
       static int16_t flow_percentage[EXTRUDERS];    // Extrusion factor for each extruder
       static float e_factor[EXTRUDERS];             // The flow percentage and volumetric multiplier combine to scale E movement
     #endif
       static inline void set_max_jerk(const AxisEnum, const_float_t ) {}
     #endif
 
-    #if EXTRUDERS
+    #if HAS_EXTRUDERS
       FORCE_INLINE static void refresh_e_factor(const uint8_t e) {
         e_factor[e] = flow_percentage[e] * 0.01f * TERN(NO_VOLUMETRICS, 1.0f, volumetric_multiplier[e]);
       }

Marlin/src/module/settings.cpp

   //
   // ADVANCED_PAUSE_FEATURE
   //
-  #if EXTRUDERS
+  #if HAS_EXTRUDERS
     fil_change_settings_t fc_settings[EXTRUDERS];       // M603 T U L
   #endif
 
     //
     // Advanced Pause filament load & unload lengths
     //
-    #if EXTRUDERS
+    #if HAS_EXTRUDERS
     {
       #if DISABLED(ADVANCED_PAUSE_FEATURE)
         const fil_change_settings_t fc_settings[EXTRUDERS] = { 0, 0 };
       //
       // Advanced Pause filament load & unload lengths
       //
-      #if EXTRUDERS
+      #if HAS_EXTRUDERS
       {
         #if DISABLED(ADVANCED_PAUSE_FEATURE)
           fil_change_settings_t fc_settings[EXTRUDERS];

Marlin/src/module/tool_change.cpp

 
 #endif // ELECTROMAGNETIC_SWITCHING_TOOLHEAD
 
-#if EXTRUDERS
+#if HAS_EXTRUDERS
   inline void invalid_extruder_error(const uint8_t e) {
     SERIAL_ECHO_START();
     SERIAL_CHAR('T'); SERIAL_ECHO(e);

Marlin/src/pins/ramps/pins_3DRAG.h

 #undef SPINDLE_DIR_PIN
 
 #if HAS_CUTTER
-  #if !EXTRUDERS
+  #if !HAS_EXTRUDERS
     #undef E0_DIR_PIN
     #undef E0_ENABLE_PIN
     #undef E0_STEP_PIN

Marlin/src/pins/sensitive_pins.h

 #define _E6_PINS
 #define _E7_PINS
 
-#if EXTRUDERS
+#if HAS_EXTRUDERS
   #undef _E0_PINS
   #define _E0_PINS E0_STEP_PIN, E0_DIR_PIN, E0_ENABLE_PIN, _E0_CS _E0_MS1 _E0_MS2 _E0_MS3
 #endif

buildroot/share/PlatformIO/scripts/common-dependencies.h

   #define HAS_GCODE_M876
 #endif
 
-#if EXTRUDERS
-  #define HAS_EXTRUDERS
-#endif
-
 #if ENABLED(DUET_SMART_EFFECTOR) && PIN_EXISTS(SMART_EFFECTOR_MOD)
   #define HAS_SMART_EFF_MOD
 #endif

ini/features.ini

 SDSUPPORT                              = src_filter=+<src/sd/cardreader.cpp> +<src/sd/Sd2Card.cpp> +<src/sd/SdBaseFile.cpp> +<src/sd/SdFatUtil.cpp> +<src/sd/SdFile.cpp> +<src/sd/SdVolume.cpp> +<src/gcode/sd>
 HAS_MEDIA_SUBCALLS                     = src_filter=+<src/gcode/sd/M32.cpp>
 GCODE_REPEAT_MARKERS                   = src_filter=+<src/feature/repeat.cpp> +<src/gcode/sd/M808.cpp>
-HAS_EXTRUDERS                          = src_filter=+<src/gcode/temp/M104_M109.cpp> +<src/gcode/config/M221.cpp>
+HAS_EXTRUDERS                          = src_filter=+<src/gcode/units/M82_M83.cpp> +<src/gcode/temp/M104_M109.cpp> +<src/gcode/config/M221.cpp>
 HAS_COOLER                             = src_filter=+<src/feature/cooler.cpp> +<src/gcode/temp/M143_M193.cpp>
 AUTO_REPORT_TEMPERATURES               = src_filter=+<src/gcode/temp/M155.cpp>
 INCH_MODE_SUPPORT                      = src_filter=+<src/gcode/units/G20_G21.cpp>

platformio.ini

   -<src/gcode/temp/M104_M109.cpp>
   -<src/gcode/temp/M155.cpp>
   -<src/gcode/units/G20_G21.cpp>
+  -<src/gcode/units/M82_M83.cpp>
   -<src/gcode/units/M149.cpp>
   -<src/libs/BL24CXX.cpp> -<src/libs/W25Qxx.cpp>
   -<src/libs/L64XX> -<src/module/stepper/L64xx.cpp> -<src/HAL/shared/HAL_spi_L6470.cpp>