kernel: Make dtb.img depend on dtc and dtbo.img on mkdtimg

Change-Id: Id079861b43862881f6a00ec70a585d98d42c4687

build/tasks/kernel.mk

@@ -1,5 +1,5 @@
 # Copyright (C) 2012 The CyanogenMod Project
-#           (C) 2017 The LineageOS Project
+#           (C) 2017-2020 The LineageOS Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -68,6 +68,7 @@ VARIANT_DEFCONFIG := $(TARGET_KERNEL_VARIANT_CONFIG)
 SELINUX_DEFCONFIG := $(TARGET_KERNEL_SELINUX_CONFIG)
 
 ## Internal variables
+DTC := $(HOST_OUT_EXECUTABLES)/dtc
 DTBS_OUT := $(PRODUCT_OUT)/dtbs
 KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
 KERNEL_CONFIG := $(KERNEL_OUT)/.config
@@ -171,7 +172,8 @@ KERNEL_MODULE_MOUNTPOINT := vendor
 endif
 MODULES_INTERMEDIATES := $(KERNEL_BUILD_OUT_PREFIX)$(call intermediates-dir-for,PACKAGING,kernel_modules)
 
-PATH_OVERRIDE :=
+# Add host bin out dir to path
+PATH_OVERRIDE := PATH=$(KERNEL_BUILD_OUT_PREFIX)$(HOST_OUT_EXECUTABLES):$$PATH
 ifeq ($(TARGET_KERNEL_CLANG_COMPILE),true)
     ifneq ($(TARGET_KERNEL_CLANG_VERSION),)
         KERNEL_CLANG_VERSION := clang-$(TARGET_KERNEL_CLANG_VERSION)
@@ -254,8 +256,8 @@ $(KERNEL_CONFIG): $(KERNEL_DEFCONFIG_SRC) $(KERNEL_ADDITIONAL_CONFIG_OUT)
 			$(call make-kernel-target,KCONFIG_ALLCONFIG=$(KERNEL_OUT)/.config alldefconfig); \
 		fi
 
-$(TARGET_PREBUILT_INT_KERNEL): $(KERNEL_CONFIG) $(DEPMOD)
-	@echo "Building Kernel"
+$(TARGET_PREBUILT_INT_KERNEL): $(KERNEL_CONFIG) $(DEPMOD) $(DTC)
+	@echo "Building Kernel Image ($(BOARD_KERNEL_IMAGE_NAME))"
 	$(call make-kernel-target,$(BOARD_KERNEL_IMAGE_NAME))
 	$(hide) if grep -q '^CONFIG_OF=y' $(KERNEL_CONFIG); then \
 			echo "Building DTBs"; \
@@ -292,7 +294,9 @@ alldefconfig: $(KERNEL_OUT)
 		 $(call make-kernel-target,alldefconfig)
 
 ifeq ($(TARGET_NEEDS_DTBOIMAGE),true)
-$(BOARD_PREBUILT_DTBOIMAGE):
+MKDTIMG := $(HOST_OUT_EXECUTABLES)/mkdtimg$(HOST_EXECUTABLE_SUFFIX)
+MKDTBOIMG := $(HOST_OUT_EXECUTABLES)/mkdtboimg.py$(HOST_EXECUTABLE_SUFFIX)
+$(BOARD_PREBUILT_DTBOIMAGE): $(DTC) $(MKDTIMG) $(MKDTBOIMG)
 	echo -e ${CL_GRN}"Building DTBO.img"${CL_RST}
 	$(call make-dtbo-target,$(KERNEL_DEFCONFIG))
 	$(call make-dtbo-target,dtbo.img)
@@ -322,7 +326,7 @@ dtboimage: $(INSTALLED_DTBOIMAGE_TARGET)
 
 ifeq ($(BOARD_INCLUDE_DTB_IN_BOOTIMG),true)
 ifeq ($(BOARD_PREBUILT_DTBIMAGE_DIR),)
-$(INSTALLED_DTBIMAGE_TARGET):
+$(INSTALLED_DTBIMAGE_TARGET): $(DTC)
 	echo -e ${CL_GRN}"Building DTBs"${CL_RST}
 	$(call make-dtb-target,$(KERNEL_DEFCONFIG))
 	$(call make-dtb-target,dtbs)