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Mail Archives: cygwin/2021/01/18/08:55:06

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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 13:54:15 +0000
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On Monday, January 18, 2021 2:23 PM Marco Atzeri wrote:
>On 18.01.2021 14:08, 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.
>>>>>>
>> 
>>>
>>>> Also ldd `which gdb` is
>>>> fine.
>>>
>>> Please show the output.
>> 
>> pc> ldd `which gdb`
>
>>          cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
>>          cygstdc++-6.dll => /usr/bin/cygstdc++-6.dll (0x3f8840000)
>
>>          cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x170000)
>                                                this is very low ^^^^
>>          cygstdc++-6.dll => /usr/bin/cygstdc++-6.dll (0x3600000)
>
>>          cygicuuc61.dll => /usr/bin/cygicuuc61.dll (0x3fc240000)
>>          cygicuuc61.dll => /usr/bin/cygicuuc61.dll (0x3600000)
>
>
>I do not see duplicate entries on my system. it seems a BLODA
>is interfering with dll's loading
>

It might very well be. I also noticed the output of ldd is not reproducible.
It shows different duplicate entries when run repeatedly and the load 
address you marked is also a duplicate:

 pc> ldd `which gdb`|grep --color gcc
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x170000)
 pc> ldd `which gdb` | grep --color gcc
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
 pc> ldd `which gdb` | grep --color gcc
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
 pc> ldd `which gdb` | grep --color gcc
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
 pc> ldd `which gdb` | grep --color gcc
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
 pc> ldd `which gdb` | grep --color gcc
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
 pc> ldd `which gdb` | grep --color gcc
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x170000)
 pc> ldd `which gdb` | grep --color gcc
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
 pc> ldd `which gdb` | grep --color gcc
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fdf60000)
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0xa0000)

Hm, is gdb dependent on gcc? I just noticed my gcc is apparently broken:
 pc> cygcheck -c gcc
Cygwin Package Information
Package              Version        Status
 pc>

Other than going through the published BLODA list is there a way I could
test and find out what is interfering? I ask because we have a lot of 
stuff installed for teleworking, especially on the network side.
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