Uboot Learning two----One of the main makefile learning----version number U_boot_version (U_boot_version = $ (version). $ (Patchlevel). $ (Sublevel). $ ( extraversion)) (24-29 lines)

BSP Support Package (Https://yunpan.cn/cqB5i8LCAMzhM access password c425, decompression after/uboot directory makefile)

Version = 1//Major release number
Patchlevel = 3//patch version number
Sublevel = 4//Minor version number
Extraversion =//additional information, generally default is empty, we can set ourselves
U_boot_version = $ (VERSION). $ (Patchlevel). $ (Sublevel). $ (extraversion)
Uboot version 1.3.4, separated by.

Version_file = $ (obj) include/version_autogenerated.h
The version number file, which is created according to the rules of line NO. 365 in the main makefile

After compiling, the path to the Version_autogenerated.h file is: Include/version_autogenerated.h under the root directory. The value of the variable u_boot_version is referenced in this file; Version_autogenerated.h This file is generated automatically at compile time, through VI can see inside content is a macro: #define U_boot_version "U-boot 1.3.4"

Uboot Learning two----One of the main makefile learning----version number U_boot_version (U_boot_version = $ (version). $ (Patchlevel). $ (Sublevel). $ ( extraversion)) (24-29 lines)