Buildroot引导加载程序

编译bootloader

Bootloaders --->

 [ ] afboot-stm32
 [ ] Barebox
 [ ] mxs-bootlets
 [ ] s500-bootloader
 [ ] ts4800-mbrboot
 [*] U-Boot
 [ ]   CRC image for Altera SoC FPGA (mkpimage)
 [ ]   Environment image  ----
 [ ]   Generate a U-Boot boot script
 ()    Device Tree Source file paths
 [ ] X-loader

u-boot编译

 [*] U-Boot
       Build system (Kconfig)  --->
       U-Boot Version (Custom Git repository)  --->
 (https://git.coding.net/codebug8/mini437x_uboot.git) URL of custom repository
 (master) Custom repository version
 ()    Custom U-Boot patches
       U-Boot configuration (Using an in-tree board defconfig file)  --->
 (mini437x) Board defconfig
 ()    Additional configuration fragment files
 [*]   U-Boot needs dtc
 [ ]   U-Boot needs pylibfdt
 [ ]   U-Boot needs OpenSSL
       U-Boot binary format  --->
 [ ]   produce a .ift signed image (OMAP)
 [*]   Install U-Boot SPL binary image
 (MLO)   U-Boot SPL/TPL binary image name(s)

参考注释

Bootloaders：硬件启动程序，选择为 U-boot

 Build system：u-boot系统选择为Kconfig
     legacy：若是选择2015.04之前的u-boot 选择此项
     Kconfig：2015.04之后的 u-boot 选择此项，勾选此项　　
 U-boot Version：U-boot版本，默认为 2017.01，选择为Custom version
 U-Boot version：填写为2017.11
 Custom U-boot patches：U-boot补丁，不添加
 U-Boot configuration：U-boot配置，暂时还没有U-BOOT，所以选择为：Using an in-tree board defconfig file
 Board defconfig：板子的配置，选择与架构一样的板子的默认文件，mini2440。后期再修改
 U-boot needs dtc：是否需要设备树，默认，后期调试
 U-boot needs OpenSSL：是否需要 OpenSSL，默认，后期调试修改
 U-boot binary format：二进制文件，选择 .bin文件
 produce a .ift signed image：默认
 Install U-boot SPL binary image：默认
 Environment image：默认