cmake suddenly stopped working

[Norton Allen]

On 11/18/2020 10:33 AM, Marco Atzeri via Cygwin wrote:
> On 18.11.2020 14:54, Norton Allen wrote:
>> On 11/18/2020 6:31 AM, Marco Atzeri via Cygwin wrote:
>>> On 18.11.2020 01:24, Norton Allen wrote:
>>>> Rolling back cmake from 3.17.3-2 to 3.14.5-1 seems to have resolved 
>>>> the problem.
>>>>
>>>> Any idea why no one else seems to be seeing this problem with 
>>>> 3.17.3-2?
>>>>
>>>
>>> I assume you had an incomplete upgrade.
>>>
>>> what is the output of "cygcheck cmake" ?
>>
>> I rolled back forward to 3.17.3-2 and verified that 3.17.3-2 still 
>> shows the problem:
>>
>> $ cygcheck cmake
>> Found: C:\cygwin64\bin\cmake.exe
>
>>        C:\Program 
>> Files\OpenJDK\jdk-13\bin\api-ms-win-core-rtlsupport-l1-1-0.dll
>
> this is strange
>
> Can you try also
>    strace -o cmake.out /usr/bin/cmake --version
>
> I expect an error with a specific shared library 

Yes, earlier in the thread I reported running with strace and 
identifying a specific symbol that was missing, apparently from the 
stdc++ library:

> This seems to be the crux of it. That entry point is simply not in the 
> g++ shared library. I have not figured out why this cropped up today, 
> since it is not present in the current (10.2.0-1) or previous 
> (9.3.0-2) versions. I will trying going back to 7.4.0.1, but it's hard 
> to imagine it's been gone so long and I haven't seen the problem 
> before today.
>
>     nort@easwhlpt3425080 /usr/bin
>     $ strings cygstdc++-6.dll | grep 
> _ZNSt19basic_ostringstreamIcSt11char_traits
> _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE3strERKSs
> _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE4swapERS3_
>     _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEC1EOS3_
> _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEC1ERKSsSt13_Ios_Openmode 
>
> _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEC1ESt13_Ios_Openmode
>     _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEC2EOS3_
> _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEC2ERKSsSt13_Ios_Openmode 
>
> _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEC2ESt13_Ios_Openmode
>     _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEED0Ev
>     _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEED1Ev
>     _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEED2Ev
>     _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEaSEOS3_
>
>     nort@easwhlpt3425080 /usr/bin
>     $ strings cmake.exe | grep 
> _ZNSt19basic_ostringstreamIcSt11char_traits
>     _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEC1Ev
>     _ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEED1Ev

_ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEC1Ev is the symbol 
that popped up in the strace error dialog.