RFR: 8335880: More troubleshooting tips around windows space in path

[SWinxy]

On Tue, 16 Jul 2024 20:57:26 GMT, Chen Liang <liach at openjdk.org> wrote:

>> Does `configure` look for a particular short name for them to be? The documentation only says "Usually, it assumes those directories have short paths." The script didn't automatically detect the short paths for Microsoft Visual Studio nor Windows Kits unless manually specified in `--with-toolchain-path=`. I think mentioning that would be beneficial. Here's my attempt at a different copy, which includes even more detail:
>> 
>> The only directories required to have short paths are `Microsoft Visual Studio`
>> (in `Program Files`) and `Windows Kits` (in `Program Files (x86)`); the rest of the
>> "contains space" warnings from configure can be ignored. The directories'
>> short paths can be set to, for example, `WINMVS~1` and `WINKIT~1`, respectively.
>> Run `configure` with `--with-toolchain-path=/mnt/c/PROGRA~2/WINKIT~1/;
>> /mnt/c/PROGRA~1/WINMVS~1`, or the short paths that you configured.
>> (`PROGRA~1` is `Program Files`, and `PROGRA~2` is `Program Files (x86)`.)
>
> @SWinxy I think configure first uses the explicit full path with spaces; it asks `cygpath` to convert the space path into the short form, as each directory can only have 1 short name. If you don't specify it, what's the error message? Like can't find VS in "well known locations"?

@liach Huh. I removed the flag, and `configure` detected it. This didn't happen before. The log says it found it "using well-known name" this time. I believe it was "configure: error: Cannot locate a valid Visual Studio installation".

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PR Comment: https://git.openjdk.org/jdk/pull/20197#issuecomment-2231834119