Rules.make - suitable for viewing in edit mode

#platform
#From Middle Frenchplate-forme,Means platform;Originally from Old Frenchplate （平的） + forme （形状）,Means a horizontal surface
PLATFORM=j7200-evm

#defconfig
#配置
DEFCONFIG=tisdk_j7200-evm_defconfig

#Architecture
结构结构
ARCH=aarch64

#u-boot machine
UBOOT_MACHINE=j7200_evm_a72_config

#Points to the root of the TI SDK
#指向 TI SDK 的根目录
export TI_SDK_PATH=/home/gp/ti-processor-sdk-linux-j7200-evm-08_02_00_02

#root of the target file system for installing applications
#Mount the target filesystem prepared by the application,?= 是如果没有被赋值过就赋予等号后面的值
DESTDIR ?=/home/gp/ti-processor-sdk-linux-j7200-evm-08_02_00_02/targetNFS

#Points to the root of the Linux libraries and headers matching the
#demo file system.
#指向与demofile system matching Linux Root directory for libraries and headers
export LINUX_DEVKIT_PATH=$(TI_SDK_PATH)/linux-devkit

#Cross compiler prefix
#交叉编译前缀
export CROSS_COMPILE=$(LINUX_DEVKIT_PATH)/sysroots/x86_64-arago-linux/usr/bin/aarch64-none-linux-gnu-

#Default CC value to be used when cross compiling. This is so that the
#GNU Make default of “cc” is not used to point to the host compiler
#Used by default when cross-compiling CC 值.这样,#GNU make的ccThe default will not use options that are often used by the host
#原本默认会从/usr/include目录中搜索头文件、从/usr/lib中搜索依赖库,当设置了–sysroot=dir后则会从dir/usr/include搜索头文件、从dir/usr/lib中搜索依赖库
export CC=$(CROS{S}_{C}OMPILE)gcc--sysroot=$(SDK_PATH_TARGET)

#Location of environment-setup file
#Local environment configuration file
export ENV_SETUP=$(LINUX_DEVKIT_PATH)/environment-setup

#The directory that points to the SDK kernel source tree
#该目录指向SDK的内核源文件
LINUXKERNEL_INSTALL_DIR=$(TI_SDK_PATH)/board-support/linux-5.10.100+gitAUTOINC+7a7a3af903-g7a7a3af903

CFLAGS=

#Strip modules when installing to conserve disk space
#安装时使用Stripmodule savings/Save disk space
INSTALL_MOD_STRIP=1

SDK_PATH_TARGET=$(TI_SDK_PATH)/linux-devkit/sysroots/aarch64-linux/

#Set EXEC_DIR to install example binaries.
#This will be configured with the setup.sh script.
#设置EXEC_DIRInstall the sample binaries
#This script will be used for configuration
EXEC_DIR ?=/home/gp/ti-processor-sdk-linux-j7200-evm-08_02_00_02/targetNFS/home/root/j7200-evm

#Add CROSS_COMPILE and UBOOT_MACHINE for the R5
添加r5of cross-compilation as welluboot机器
export CROSS_COMPILE_ARMV7=$(LINUX_DEVKIT_PATH)/sysroots/x86_64-arago-linux/usr/bin/arm-none-linux-gnueabihf-
UBOOT_MACHINE_R5=j7200_evm_r5_config

MAKE_JOBS=4