llvm dev - Dec 2019 - libc++ tests won't run due to a breaking change in Python 3.8 libraries

The libc++ tests rely on the `platform.linux_distribution()` API [1], which is
deprecated since Python 3.5 and removed [2] in Python 3.8, which is already
released. This API is used to XFAIL certain tests based on the linux distro.

So, I can’t run libc++ tests when the only Python I have is 3.8.

Yes, I know, I could use Python 2, but I really don’t want to, since it will die
in less than a month [3].

The proposed solution is to use the distro package [3], but AFAIK the LLVM
community doesn’t want to depend on third-party packages.

Any ideas how this can be dealt with?

[1]
https://github.com/llvm/llvm-project/blob/c8f0d3e130d336f49c204b9ee317bf99be192a82/libcxx/utils/libcxx/test/target_info.py#L194-L216

[2]
https://docs.python.org/3.7/library/platform.html#platform.linux_distribution

[3] https://pythonclock.org

[4] https://pypi.org/project/distro/

It seems like the only actually used feature generated by this function 
is "suse-linux-enterprise-server-11".

If that’s true, we could implement an ad-hoc solution for that case. 
SLES 11 is a very old distribution and I’d expect nobody to run Python 
3.8 on it. Therefore we could maybe not add any distribution feature if 
`platform.linux_distribution()` is missing.

On 2019-12-05 19:28, Sergej Jaskiewicz via llvm-dev
wrote:
> The libc++ tests rely on the `platform.linux_distribution()` API [1],
> which is deprecated since Python 3.5 and removed [2] in Python 3.8,
> which is already released. This API is used to XFAIL certain tests
> based on the linux distro.
> 
> So, I can’t run libc++ tests when the only Python I have is 3.8.
> 
> Yes, I know, I could use Python 2, but I really don’t want to, since
> it will die in less than a month [3].
> 
> The proposed solution is to use the distro package [3], but AFAIK the
> LLVM community doesn’t want to depend on third-party packages.
> 
> Any ideas how this can be dealt with?
> 
> [1]
>
https://github.com/llvm/llvm-project/blob/c8f0d3e130d336f49c204b9ee317bf99be192a82/libcxx/utils/libcxx/test/target_info.py#L194-L216
> 
> [2]
>
https://docs.python.org/3.7/library/platform.html#platform.linux_distribution
> 
> [3] https://pythonclock.org
> 
> [4] https://pypi.org/project/distro/
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