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Subject:	Re: gdb not working
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Date:	Mon, 18 Jan 2021 11:52:59 -0500
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From:	Ken Brown via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Ken Brown <kbrown AT cornell DOT edu>
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[Resending.  Accidentally sent to OP instead of list.]

On 1/18/2021 8:08 AM, Lemke, Michael SF/HZA-ZIC2 wrote:
> On Friday, January 15, 2021 9:02 PM Ken Brown wrote:
>> On 1/15/2021 1:47 PM, Lemke, Michael SF/HZA-ZIC2 wrote:
>>> On Friday, January 15, 2021 4:45 PM Jon Turney wrote:
>>>> On 15/01/2021 12:28, Lemke, Michael wrote:
>>>>> I just installed a fresh copy of Cygwin and gdb with setup-x86_64.exe.
>>>>> However, gdb does not produce any output.
>>>>>
>>>>> Installing gdb versions 7.9.1-1 and 7.10.1-1 work, anything newer doesn't.
>>>>> Any ideas why?
>>>> [...]
>>>>
>>>>> Install gdb 7.12.1-2
>>>>>     pc> gdb -v
>>>>> Install gdb 8.0.1-1
>>>>>     pc> gdb -v
>>>>>     pc> cygcheck -c gdb
>>>>> Cygwin Package Information
>>>>> Package              Version        Status
>>>>> gdb                  8.0.1-1        OK
>>>>
>>>> You might try 'strace gdb' and see if that sheds any light on what's
>>>> failing.
>>>
>>> I tried that but I couldn't see anything strange.
>>
>> No error code?  Please show the output.
> 
>   pc> gdb -v
>   pc> echo $?
> 0

I was asking for the strace output.  It might just show the same DLL loading 
issues that Marco noticed, or it might show something more.

>>
>>> Also ldd `which gdb` is
>>> fine.
>>
>> Please show the output.
> 
> pc> ldd `which gdb`
>          ntdll.dll => /c/WINDOWS/SYSTEM32/ntdll.dll (0x7fffde2c0000)
>          KERNEL32.DLL => /c/WINDOWS/System32/KERNEL32.DLL (0x7fffdce40000)
>          KERNELBASE.dll => /c/WINDOWS/System32/KERNELBASE.dll (0x7fffdb570000)
>          cygexpat-1.dll => /usr/bin/cygexpat-1.dll (0x3fe900000)
>          cygintl-8.dll => /usr/bin/cygintl-8.dll (0x3fc1b0000)
>          cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x3fe770000)
>          cygwin1.dll => /usr/bin/cygwin1.dll (0x180040000)
>          cygmpfr-6.dll => /usr/bin/cygmpfr-6.dll (0x3f9db0000)
>          cyglzma-5.dll => /usr/bin/cyglzma-5.dll (0x3fa160000)
>          libpython3.6m.dll => /usr/bin/libpython3.6m.dll (0x3f78d0000)
>          cygncursesw-10.dll => /usr/bin/cygncursesw-10.dll (0x3fbd70000)
>          cygreadline7.dll => /usr/bin/cygreadline7.dll (0x3f90d0000)
>          cygz.dll => /usr/bin/cygz.dll (0x3f7e10000)
>          cygsource-highlight-4.dll => /usr/bin/cygsource-highlight-4.dll (0x3f8c70000)
>          cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
>          cygstdc++-6.dll => /usr/bin/cygstdc++-6.dll (0x3f8840000)
>          cyggmp-10.dll => /usr/bin/cyggmp-10.dll (0x3fd8e0000)
>          cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x170000)
>          cygstdc++-6.dll => /usr/bin/cygstdc++-6.dll (0x3600000)
>          cygboost_regex-1_66.dll => /usr/bin/cygboost_regex-1_66.dll (0x3ff520000)
>          cygicui18n61.dll => /usr/bin/cygicui18n61.dll (0x3fc3e0000)
>          cygicuuc61.dll => /usr/bin/cygicuuc61.dll (0x3fc240000)
>          cygicuuc61.dll => /usr/bin/cygicuuc61.dll (0x3600000)
>          cygicudata61.dll => /usr/bin/cygicudata61.dll (0x3fa3c0000)
> 
>>
>>> I tried the cygcheck Marco Atzeri suggested. I am not comfortable to send
>>> the result to the list but I checked it.
>>
>> Can you remove the sensitive parts and then send it?  It's hard for anyone on
>> the list to help you if you don't provide information about your installation.
> 
> I'll see what I can do.
> 
>>
>>> As a result I cleaned up my path to just /bin which removed some duplicate
>>> entries in cygcheck.out but gdb still doesn't work.
>>>
>>> The only strange part I see in cygcheck.out is a slight mess up with my
>>> installation, a result of my moving /c/cygwin64 to /c/mystuff/ncygwin64
>>> after my first run of setup.exe, see below.  So what has changed between
>>> gdb 7.10.1-1 and gdb 7.12.1-2?
>>
>> Dependencies may have changed.  Have you checked that you have all dependencies
>> of whatever version you're trying to run?  Just re-running setup should take
>> care of that if that's the problem.
> 
> I've always installed every version with setup so the dependencies should have
> been taken care of. And
> 
>   pc> cygcheck -c gdb
> Cygwin Package Information
> Package              Version        Status
> gdb                  9.2-1          OK

cygcheck doesn't check dependencies.  But that doesn't appear to be the issue 
anyway.

Ken
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