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From: "Lemke, Michael  SF/HZA-ZIC2" <lemkemch AT schaeffler DOT com>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: RE: gdb not working
Thread-Topic: gdb not working
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Date: Mon, 18 Jan 2021 13:08:58 +0000
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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

>
>> 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

And one more:
 pc> gdb -v >& blah
 pc> cat blah
 pc>

i.e. empty file blah.
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