[Mod] 优化顶层变量的传递

.gitignore

@@ -13,5 +13,7 @@
 
 Module.symvers
 modules.order
+compile_commands.json
 
+.cache/
 output/

Makefile

@@ -10,7 +10,11 @@
 # Path information
 #*******************************************************************************
 LOCAL_DIR    := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
-KERNEL_DIR   ?= $(realpath $(LOCAL_DIR)/../../../linux_5.10)
+
+# SDK directories
+SDK_TOP       ?= $(HOME)/Source/15-SG200x/01-MilkDuo/02-Project/SDK_SG200x_V2.0.0
+KERNEL_DIR    ?= $(SDK_TOP)/linux_5.10/build/sg2000_milkv_duos_glibc_arm64_sd
+TOOLCHAIN_DIR ?= $(SDK_TOP)/host-tools/gcc/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu/bin
 
 # Subdirectory
 
@@ -19,25 +23,32 @@ INSTALL_DIR  ?= $(LOCAL_DIR)/__install
 #$(info Output directoty : $(OUTPUT_DIR))
 #$(info Install directoty: $(INSTALL_DIR))
 
+export KERNEL_DIR
 #*******************************************************************************
 # Variables
 #*******************************************************************************
 MULTI_CORES ?= $(shell grep -c ^processor /proc/cpuinfo)
 
-SUB_DIRS := spi 01-Debug
+SUB_DIRS := \
+	spi \
+	01-Debug
 
 #*******************************************************************************
 # Compile configure
 #*******************************************************************************
-ARCH          ?= riscv
-CROSS_COMPILE ?= riscv64-unknown-linux-musl-
+#ARCH          ?= riscv
+#CROSS_COMPILE ?= riscv64-unknown-linux-musl-
+ARCH          ?= arm64
+CROSS_COMPILE ?= aarch64-linux-gnu-
 
 CC            := $(CROSS_COMPILE)gcc
 LD            := $(CROSS_COMPILE)ld
 AR            := $(CROSS_COMPILE)ar
 STRIP         := $(CROSS_COMPILE)strip
 
-export ARCH CROSS_COMPILE
+PATH := $(TOOLCHAIN_DIR):$(PATH)
+
+export ARCH CROSS_COMPILE PATH
 #*******************************************************************************
 # Targets
 #*******************************************************************************