From 131d216afada6cf30ddbc4387f1ffefc920106c9 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <thinkyhead@users.noreply.github.com>
Date: Fri, 3 Aug 2018 21:49:04 -0500
Subject: [PATCH] Fix drivers.h dependency, defer macro evaluation (#11450)

---
 Marlin/src/core/drivers.h        | 49 ++++++--------------------------
 Marlin/src/inc/MarlinConfigPre.h |  2 +-
 2 files changed, 9 insertions(+), 42 deletions(-)

diff --git a/Marlin/src/core/drivers.h b/Marlin/src/core/drivers.h
index dbbeaeb428..cd2103baca 100644
--- a/Marlin/src/core/drivers.h
+++ b/Marlin/src/core/drivers.h
@@ -44,47 +44,14 @@
 #define AXIS_DRIVER_TYPE_X(T) AXIS_DRIVER_TYPE(X,T)
 #define AXIS_DRIVER_TYPE_Y(T) AXIS_DRIVER_TYPE(Y,T)
 #define AXIS_DRIVER_TYPE_Z(T) AXIS_DRIVER_TYPE(Z,T)
-
-#if ENABLED(X_DUAL_STEPPER_DRIVERS) || ENABLED(DUAL_X_CARRIAGE)
-  #define AXIS_DRIVER_TYPE_X2(T) AXIS_DRIVER_TYPE(X2,T)
-#else
-  #define AXIS_DRIVER_TYPE_X2(T) false
-#endif
-#if ENABLED(Y_DUAL_STEPPER_DRIVERS)
-  #define AXIS_DRIVER_TYPE_Y2(T) AXIS_DRIVER_TYPE(Y2,T)
-#else
-  #define AXIS_DRIVER_TYPE_Y2(T) false
-#endif
-#if ENABLED(Z_DUAL_STEPPER_DRIVERS)
-  #define AXIS_DRIVER_TYPE_Z2(T) AXIS_DRIVER_TYPE(Z2,T)
-#else
-  #define AXIS_DRIVER_TYPE_Z2(T) false
-#endif
-#if E_STEPPERS > 0
-  #define AXIS_DRIVER_TYPE_E0(T) AXIS_DRIVER_TYPE(E0,T)
-#else
-  #define AXIS_DRIVER_TYPE_E0(T) false
-#endif
-#if E_STEPPERS > 1
-  #define AXIS_DRIVER_TYPE_E1(T) AXIS_DRIVER_TYPE(E1,T)
-#else
-  #define AXIS_DRIVER_TYPE_E1(T) false
-#endif
-#if E_STEPPERS > 2
-  #define AXIS_DRIVER_TYPE_E2(T) AXIS_DRIVER_TYPE(E2,T)
-#else
-  #define AXIS_DRIVER_TYPE_E2(T) false
-#endif
-#if E_STEPPERS > 3
-  #define AXIS_DRIVER_TYPE_E3(T) AXIS_DRIVER_TYPE(E3,T)
-#else
-  #define AXIS_DRIVER_TYPE_E3(T) false
-#endif
-#if E_STEPPERS > 4
-  #define AXIS_DRIVER_TYPE_E4(T) AXIS_DRIVER_TYPE(E4,T)
-#else
-  #define AXIS_DRIVER_TYPE_E4(T) false
-#endif
+#define AXIS_DRIVER_TYPE_X2(T) (ENABLED(X_DUAL_STEPPER_DRIVERS) || ENABLED(DUAL_X_CARRIAGE)) && AXIS_DRIVER_TYPE(X2,T)
+#define AXIS_DRIVER_TYPE_Y2(T) (ENABLED(Y_DUAL_STEPPER_DRIVERS) && AXIS_DRIVER_TYPE(Y2,T))
+#define AXIS_DRIVER_TYPE_Z2(T) (ENABLED(Z_DUAL_STEPPER_DRIVERS) && AXIS_DRIVER_TYPE(Z2,T))
+#define AXIS_DRIVER_TYPE_E0(T) (E_STEPPERS > 0 && AXIS_DRIVER_TYPE(E0,T))
+#define AXIS_DRIVER_TYPE_E1(T) (E_STEPPERS > 1 && AXIS_DRIVER_TYPE(E1,T))
+#define AXIS_DRIVER_TYPE_E2(T) (E_STEPPERS > 2 && AXIS_DRIVER_TYPE(E2,T))
+#define AXIS_DRIVER_TYPE_E3(T) (E_STEPPERS > 3 && AXIS_DRIVER_TYPE(E3,T))
+#define AXIS_DRIVER_TYPE_E4(T) (E_STEPPERS > 4 && AXIS_DRIVER_TYPE(E4,T))
 
 #define HAS_DRIVER(T)  (AXIS_DRIVER_TYPE_X(T)  || AXIS_DRIVER_TYPE_X2(T) || \
                         AXIS_DRIVER_TYPE_Y(T)  || AXIS_DRIVER_TYPE_Y2(T) || \
diff --git a/Marlin/src/inc/MarlinConfigPre.h b/Marlin/src/inc/MarlinConfigPre.h
index c29de37c96..7f9b50eb01 100644
--- a/Marlin/src/inc/MarlinConfigPre.h
+++ b/Marlin/src/inc/MarlinConfigPre.h
@@ -29,8 +29,8 @@
 #include "../core/types.h"
 #include "Version.h"
 #include "../../Configuration.h"
-#include "../core/drivers.h"
 #include "Conditionals_LCD.h"
+#include "../core/drivers.h"
 #include "../../Configuration_adv.h"
 #include "Conditionals_adv.h"