Cygwin GDB won't start or hangs at startup

[Jon Turney]

On 05/02/2021 19:06, Marco Atzeri via Cygwin wrote:
> On 05.02.2021 17:39, Lemke, Michael SF/HZA-ZIC2 wrote:
>> On Friday, February 5, 2021 4:18 PM Takashi Yano wrote:
>>> On Fri, 5 Feb 2021 10:07:46 +0100
>>> Marco Atzeri wrote:
>>>> On 05.02.2021 08:55, Daniel Röhrborn via Cygwin wrote:
>>>>>> On 04.02.2021 13:13, Daniel Röhrborn via Cygwin wrote:
>>>>
> 
>>>
>>> I looked into this problem and found this issue causes if iconv
>>> cannot be found in the search path.
>>>
>>> Installing libiconv package should solve the issue, I guess.
>>
>> I can confirm that installing libiconv solves the problem. So it
>> was not a case of BLODA here.
>>
>>>
>>> It seems that the GDB package should set a dependency on libiconv.
>>>
>>
>> I had libiconv2 installed. Is that somehow related?
> 
> 
> gdb always needed the shared lib in libiconv2
> 
> $ cygcheck /usr/bin/gdb.exe | grep iconv
>    D:\cygwin64\bin\cygiconv-2.dll
> 
> $ cygcheck -f /usr/bin/cygiconv-2.dll
> libiconv2-1.16-2
> 
> but is seems the last versions are also calling
> the program that is packaged separately
> 
> $ cygcheck -f /usr/bin/iconv.exe
> libiconv-1.16-2
> 
> this dependency is more difficult to catch
> and it was missed when GDB was packaged

Thanks for investigating this, and fixing it on sourceware.

I've updated the .cygport appropriately.

It seems that gdb wants to run 'iconv -l' to list the available encodings.

It looks like perhaps an upstream bug that gdb outputs nothing when 
iconv can't be found (rather than using the default encoding?).