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第一次使用此类芯片，初上手编译时，环境为Ubuntu 18.04LTS，按手册一步步编译时出现了如下错误
此前输入 make -s all BOARD=j721e_evm
请问是什么原因导致的？
请参考下面帖子里的编译步骤。https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1030525/tda4vm-example-program-for-mcal-build
我就是按照这个帖子里的步骤进行编译的，仍然出现了以上错误，请问是什么导致的呢
我把您的问题升级到英文e2e论坛了，请关注下面帖子的回复。
For J721E SDK 8.5 ,to build all the examples by default we have j721e_evm and mcu1_0 selected.
so you can give command "make -s all"
Please do a clean build "make allclean" and proceed further.
Is customer using default examples files ?https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1199110/tda4vm-rtos-build-mcal-error
谢谢你，已经解决了，问题是出在我没有将linux-sdk包中的镜像拷贝到RTOS-SDK根目录下导致的
不客气～
非常感谢分享解决办法！
