cygcheck doesn't work on DLLs and executables in current working directory

cygcheck doesn't work on DLLs and executables in current working directory

[Hamish McIntyre-Bhatty]

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Hi,

I've noticed that cygcheck doesn't work when run against executables and
DLLs in the current working directory. Has anyone else experienced this?

Hamish


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Re: cygcheck doesn't work on DLLs and executables in current working directory

[Marco Atzeri]

On 02.10.2020 17:59, Hamish McIntyre-Bhatty via Cygwin wrote:
> Hi,
> 
> I've noticed that cygcheck doesn't work when run against executables and
> DLLs in the current working directory. Has anyone else experienced this?
> 
> Hamish
> 
> 

how are you calling it ?


$ cygcheck ./hello_c.exe
d:\cyg_pub\devel\openmpi\examples64\hello_c.exe
   D:\cygwin64\bin\cygwin1.dll
     C:\WINDOWS\system32\KERNEL32.dll
       C:\WINDOWS\system32\ntdll.dll
       C:\WINDOWS\system32\KERNELBASE.dll
   D:\cygwin64\bin\cygmpi-40.dll
     D:\cygwin64\bin\cygopen-pal-40.dll
       D:\cygwin64\bin\cygz.dll
       D:\cygwin64\bin\cyggcc_s-seh-1.dll
     D:\cygwin64\bin\cygopen-rte-40.dll

Re: cygcheck doesn't work on DLLs and executables in current working directory

[Hamish McIntyre-Bhatty]

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On 02/10/2020 17:33, Marco Atzeri via Cygwin wrote:
> On 02.10.2020 17:59, Hamish McIntyre-Bhatty via Cygwin wrote:
>> Hi,
>>
>> I've noticed that cygcheck doesn't work when run against executables and
>> DLLs in the current working directory. Has anyone else experienced this?
>>
>> Hamish
>>
>>
>
> how are you calling it ?
>
>
> $ cygcheck ./hello_c.exe
> d:\cyg_pub\devel\openmpi\examples64\hello_c.exe
>   D:\cygwin64\bin\cygwin1.dll
>     C:\WINDOWS\system32\KERNEL32.dll
>       C:\WINDOWS\system32\ntdll.dll
>       C:\WINDOWS\system32\KERNELBASE.dll
>   D:\cygwin64\bin\cygmpi-40.dll
>     D:\cygwin64\bin\cygopen-pal-40.dll
>       D:\cygwin64\bin\cygz.dll
>       D:\cygwin64\bin\cyggcc_s-seh-1.dll
>     D:\cygwin64\bin\cygopen-rte-40.dll
> -- 
> Problem reports:      https://cygwin.com/problems.html
> FAQ:                  https://cygwin.com/faq/
> Documentation:        https://cygwin.com/docs.html
> Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple

Irritatingly, I can't reproduce that now. It might well have been
something to do with my setup because VirtualBox is causing all sorts of
annoying problems at the moment. I'll reply again with output if it
happens again.

I did find something else though:

If I make a temporary directory and move into it, and then copy
/bin/bash and /bin/cygwin1.dll into it, if I run "cygcheck
/bin/bash.exe" it then says it depends on the cygwin1 DLL in the current
directory rather than the one in /bin:

Hamish@Hamish-PC ~
$ mkdir temp2

Hamish@Hamish-PC ~
$ cd temp2

Hamish@Hamish-PC ~/temp2
$ cp /bin/bash.exe /bin/cygwin1.dll ./

Hamish@Hamish-PC ~/temp2
$ cygcheck ./bash.exe
C:\cygwin64\home\Hamish\temp2\bash.exe
  C:\cygwin64\home\Hamish\temp2\cygwin1.dll
    C:\WINDOWS\system32\KERNEL32.dll
      C:\WINDOWS\system32\ntdll.dll
      C:\WINDOWS\system32\KERNELBASE.dll
  C:\cygwin64\bin\cygiconv-2.dll
  C:\cygwin64\bin\cygintl-8.dll
  C:\cygwin64\bin\cygreadline7.dll
    C:\cygwin64\bin\cygncursesw-10.dll

Hamish@Hamish-PC ~/temp2
$ cygcheck /bin/bash.exe
C:\cygwin64\bin\bash.exe
  C:\cygwin64\home\Hamish\temp2\cygwin1.dll
    C:\WINDOWS\system32\KERNEL32.dll
      C:\WINDOWS\system32\ntdll.dll
      C:\WINDOWS\system32\KERNELBASE.dll
  C:\cygwin64\bin\cygiconv-2.dll
  C:\cygwin64\bin\cygintl-8.dll
  C:\cygwin64\bin\cygreadline7.dll
    C:\cygwin64\bin\cygncursesw-10.dll

Not sure if this classes as a bug, rather than an interesting quirk with
the search path order (I guess), but perhaps worth mentioning.

Hamish


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Re: cygcheck doesn't work on DLLs and executables in current working directory

[Marco Atzeri]

On 05.10.2020 17:20, Hamish McIntyre-Bhatty via Cygwin wrote:
> On 02/10/2020 17:33, Marco Atzeri via Cygwin wrote:
>> On 02.10.2020 17:59, Hamish McIntyre-Bhatty via Cygwin wrote:
>>> Hi,
>>>
>>> I've noticed that cygcheck doesn't work when run against executables and
>>> DLLs in the current working directory. Has anyone else experienced this?
>>>
>>> Hamish
>>>
>>>
>>
>> how are you calling it ?
>>
>>
>> $ cygcheck ./hello_c.exe
>> d:\cyg_pub\devel\openmpi\examples64\hello_c.exe
>>    D:\cygwin64\bin\cygwin1.dll
>>      C:\WINDOWS\system32\KERNEL32.dll
>>        C:\WINDOWS\system32\ntdll.dll
>>        C:\WINDOWS\system32\KERNELBASE.dll
>>    D:\cygwin64\bin\cygmpi-40.dll
>>      D:\cygwin64\bin\cygopen-pal-40.dll
>>        D:\cygwin64\bin\cygz.dll
>>        D:\cygwin64\bin\cyggcc_s-seh-1.dll
>>      D:\cygwin64\bin\cygopen-rte-40.dll
>> -- 
>> Problem reports:      https://cygwin.com/problems.html
>> FAQ:                  https://cygwin.com/faq/
>> Documentation:        https://cygwin.com/docs.html
>> Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple
> 
> Irritatingly, I can't reproduce that now. It might well have been
> something to do with my setup because VirtualBox is causing all sorts of
> annoying problems at the moment. I'll reply again with output if it
> happens again.
> 
> I did find something else though:
> 
> If I make a temporary directory and move into it, and then copy
> /bin/bash and /bin/cygwin1.dll into it, if I run "cygcheck
> /bin/bash.exe" it then says it depends on the cygwin1 DLL in the current
> directory rather than the one in /bin:
> 

that is expected. It is as Windows works

the shared libs in the same directory have precedence
on the one on the path.