am1808-DaVinci-PSP-SDK-uboot编译_pspsdk-优快云博客

本文链接：https://blog.youkuaiyun.com/hahajumping/article/details/7252848

本文详细介绍了U-Boot的编译过程，包括定义变量、清除配置、初次配置和二次配置，以及在此过程中遇到的警告信息。通过逐步解析命令和输出，深入理解U-Boot的配置和编译原理。

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编译过程

root@jumping-desktop:/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk# jpcr=CROSS_COMPILE=arm-none-linux-gnueabi- 《定义变量
root@jumping-desktop:/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk# echo $jpcr 《显示变量
CROSS_COMPILE=arm-none-linux-gnueabi-
root@jumping-desktop:/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk# make distclean $jpcr 《clear
root@jumping-desktop:/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk# make da850evm_config $jpcr 《第一次config

awk '(NF && $1 !~ /^#/) { print $1 ": " $1 "_config; $(MAKE)" }' boards.cfg > .boards.depend
Configuring for da850evm board...
root@jumping-desktop:/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk# make da850evm_config $jpcr《第二次config
Generating include/autoconf.mk
In file included from /usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk/include/config.h:4,
from include/common.h:37:
/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk/include/configs/da850evm.h:140:1: warning: "CONFIG_ENV_SIZE" redefined
/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk/include/configs/da850evm.h:128:1: warning: this is the location of the previous definition
/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk/include/configs/da850evm.h:141:1: warning: "CONFIG_ENV_OFFSET" redefined
/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk/include/configs/da850evm.h:127:1: warning: this is the location of the previous definition
/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk/include/configs/da850evm.h:142:1: warning: "CONFIG_ENV_SECT_SIZE" redefined
/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk/include/configs/da850evm.h:133:1: warning: this is the location of the previous definition
Generating include/autoconf.mk.dep
Configuring for da850evm board...
root@jumping-desktop:/usr/local/ti-sdk-am180x-evm/board-support/u-boot-2010.12-psp03.21.00.04.sdk# make all $jpcr 《make all