为什么无法在ubuntu20.04上使用flex builder构建tsntool？

当我在 ubuntu20.04 上使用 flex builder 编译 tsntool 时，发现无法访问“的错误我读了另一篇文章那个来源。 codeaurora.org 停止服务了，那么现在有什么办法可以编译 tsntool 吗？

hingw@ubuntu:~/ls1028/flexbuild_lsdk2108$ flex-builder -c tsntool
COMPONENT: tsntool
make: Entering directory '/home/hingw/ls1028/flexbuild_lsdk2108'
make[1]: Entering directory '/home/hingw/ls1028/flexbuild_lsdk2108/packages/apps'

Building tsntool ...
Cloning into '/home/hingw/ls1028/flexbuild_lsdk2108/components/apps/networking/tsntool'...
fatal: unable to accessCould not resolve host: source.codeaurora.org
make[1]: *** [/home/hingw/ls1028/flexbuild_lsdk2108/packages/apps/networking/tsntool.mk:11: tsntool] Error 128
make[1]: Leaving directory '/home/hingw/ls1028/flexbuild_lsdk2108/packages/apps'
make: *** [Makefile:25: tsntool] Error 2
make: Leaving directory '/home/hingw/ls1028/flexbuild_lsdk2108'
另外，我在github上看到tsntool源码包，编译器说明指定了一个kernal源码路径，这个路径应该填什么？

1. Libraries requirement
   Libraries libnl-3.0, libtermcap, libreadline libcjson are needed.

2. How to compile the tsntool:

2.1 Setup cross compile environment
2.2 Compile binary:
    > source source_arm64.sh
    > make

    The tsntool and libtsn.so will be generated.

                                 

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