[Patch] lit.cfg: better check for MSYS

[NAKAMURA Takumi]

I suppose that system's python should be /usr/bin/python in Cygwin's world.
I didn't know Python/win32 could run Lit for cygwin tests.

What is a motivation for you to take *external* python on cygwin?





2013/7/30 Hans Wennborg <hans at chromium.org>:
> I use the system's Python, maybe that's why we get different results:
>
> $ /cygdrive/c/python_26_amd64/files/python bin/llvm-lit -v
> ../tools/clang/test/Driver/cl.c
> -- Testing: 1 tests, 1 threads --
> UNSUPPORTED: Clang :: Driver/cl.c (1 of 1)
> Testing Time: 0.00s
>   Unsupported Tests  : 1
> llvm-lit: lit.cfg:184: note: using clang:
> 'D:/src/llvm/build.debug/bin/./clang.EXE'
>
> In my case, lit.getBashPath() returns "C:\src\cygwin\bin\bash.EXE".
>
> Do you think my patch is OK?
>
>
> On Mon, Jul 29, 2013 at 10:34 AM, NAKAMURA Takumi <geek4civic at gmail.com> wrote:
>> Hans, I am certain it would be less useful on cygwin.
>>
>> Python 2.6.8 (unknown, Jun  9 2012, 11:30:32)
>>>>> import platform
>>>>> platform.system()
>> 'CYGWIN_NT-6.1-WOW64'
>>
>> I can see "shell-preserves-root" is enabled on cygwin.
>>
>> PASS: Clang :: Driver/cl.c (2638 of 6275)
>>
>> Which version of python are you using on cygwin?
>>
>>
>> 2013/7/30 Hans Wennborg <hans at chromium.org>:
>>> Hi,
>>>
>>> The attached patch tightens the "shell-preserves-root" feature check
>>> in lit.cfg. Previously, the check would exclude this feature also on
>>> Cygwin, but as the comment suggests, I think it should only check for
>>> MSYS.
>>>
>>> With this patch, the number of unsupported tests on Cygwin go from 35 to 32.
>>>
>>> I was not able to test this on MSYS. Takumi, could you give it a try?
>>>
>>> Thanks,
>>> Hans