RFR: 8248526: configure script failed on WSL in May 2020 update

[Magnus Ihse Bursie]

On 2020-06-30 14:11, Yasumasa Suenaga wrote:
> Thanks Magnus!
>
> We cannot build OpenJDK on Windows 10 May 2020 update even if we use 
> WSL 1.
> So I will push this change when I got second reviewer.
The two-reviewer rule is only for hotspot code. Build changes only 
requires one review, so you are good to go now.
>
> I hope we can build OpenJDK on WSL 2, and I will help you if I can :)
I am curious what kind of performance you are getting. I experimented a 
lot, but ran into several issues indicating that WSL2 was not mature 
enough yet. But what was even more worrying was that I could not see any 
performance gains compared to WSL1 or cygwin. :(

/Magnus
>
>
> Yasumasa
>
>
> On 2020/06/30 18:24, Magnus Ihse Bursie wrote:
>> On 2020-06-30 09:47, Yasumasa Suenaga wrote:
>>> Hi all,
>>>
>>> Please review this change.
>>> This change is happen on discussion for WSL 2 support [1], but I 
>>> tested this change on WSL 1 (Ubuntu 20.04).
>>>
>>>   JBS: https://bugs.openjdk.java.net/browse/JDK-8248526
>>>   webrev: http://cr.openjdk.java.net/~ysuenaga/JDK-8248526/webrev.00/
>> Hi Yasumasa,
>>
>> FYI, I have been working for a time on a major rewrite of the way we 
>> handle Windows compilation, which will support cygwin, msys2, wsl1, 
>> wsl2 and wine-on-linux, and doing all of this in a cleaner and much 
>> more unified way than we currently do. However, this is far from 
>> ready, and most likely I'll have to continue working with it after my 
>> upcoming vacation. So in the meantime, if your fix solves the 
>> immediate problems, I think we should take it in. The patch itself 
>> looks good to me.
>>
>> /Magnus
>>>
>>> I saw two configure errors when I run configure script on WSL in 
>>> Windows 10 May 2020 update (See JBS for more details).
>>> Since Windows 10 build 18945 [2], wslpath issue [3] has been fixed. 
>>> I guess this is the cause of wslpath problem in configure script.
>>>
>>>
>>> Thanks,
>>>
>>> Yasumasa
>>>
>>>
>>> [1] 
>>> https://mail.openjdk.java.net/pipermail/build-dev/2020-June/027571.html
>>> [2] 
>>> https://docs.microsoft.com/ja-jp/windows/wsl/release-notes#build-18945
>>> [3] https://github.com/microsoft/WSL/issues/4078
>>