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AM6442: Yocto build error

Part Number: AM6442


Hello TI supporter,

I have followed these step on https://software-dl.ti.com/processor-sdk-linux/esd/AM64X/07_03_01_006/exports/docs/linux/Overview_Building_the_SDK.html#build-options

to re-compile sdk but not success.

1- Install toolschains to /opt/

gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf.tar.xz

gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu.tar.xz

2-Do these steps:
git clone git://arago-project.org/git/projects/oe-layersetup.git yocto-build
cd yocto-build
./oe-layertool-setup.sh -f configs/coresdk/coresdk-07.03.00.005-config.txt
cd build
. conf/setenv
export TOOLCHAIN_PATH_ARMV7=/opt/gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf/
export TOOLCHAIN_PATH_ARM8=/opt/gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu/
MACHINE=am64x-evm bitbake core-image-minimal

ERROR: Unable to start bitbake server (None)
ERROR: Server log for this session (/home/brian/processor_sdk_linux_am64x_07_03_01_006/yocto-build/build/bitbake-cookerdaemon.log):
--- Starting bitbake server pid 32089 at 2021-06-21 09:26:19.083500 ---
ERROR: Failed to obtain external Arm toolchain version: Execution of '${DEF_TOOLCHAIN_PATH}/bin/INVALID-linux-gcc -v' failed: command not found
ERROR: Failed to obtain external Arm toolchain version: Execution of '${DEF_TOOLCHAIN_PATH}/bin/INVALID-linux-gcc -v' failed: command not found
ERROR: Error: EXTERNAL_TOOLCHAIN path '${DEF_TOOLCHAIN_PATH}' does not exist


I don't know how to fix this issue. Please give me your suggestion.
Thanks,