On 08/11/2020 19:27, Ken Brown via Cygwin-patches wrote:
> On 11/8/2020 1:52 PM, Jon Turney wrote:
>> On 08/11/2020 18:19, Ken Brown via Cygwin-patches wrote:
>>> On 11/5/2020 2:47 PM, Jon Turney wrote:
>>>> +# temporary directory to be used for files created by tests (as an 
>>>> absolute,
>>>> +# /cygdrive path, so it can be understood by the test DLL, which 
>>>> will have
>>>> +# different mount table)
>>>> +tmpdir = $(shell cygpath -ma $(objdir)/testsuite/tmp/ | sed -e 
>>>> 's#^\([A-Z]\):#/cygdrive/\L\1#')
>>>
>>> This isn't right if the cygdrive prefix is not 'cygdrive'.  Maybe use 
>>> 'proc/cygdrive' instead of 'cygdrive'?
>>>
>>
>> That's how I originally had it.  Unfortunately, test ltp/symlink01 
>> relies on the test directory being specified as a canonicalized 
>> pathname (i.e. is the same after realpath()).
>>
>> Since there's no /etc/fstab in the the filesystem relative to the test 
>> DLL, I think it should always be using the default cygdrive prefix?
> 
> But there's a mkdir command that seems to be run in the context of the 
> user running 'make check'.  If the cygdrive prefix is not 'cygdrive', 
> 'make check' fails as follows:
> 
> ERROR: tcl error sourcing 
> /home/kbrown/src/cygdll/newlib-cygwin/winsup/testsuite/winsup.api/winsup.exp. 
> 
> ERROR: can't create directory "/cygdrive": permission denied
>      while executing
> "file mkdir $tmpdir/$base"
> 

Ah, I see.

Maybe something like the attached is needed.