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Subject:	Re: cmake suddenly stopped working
From:	Norton Allen <allen AT huarp DOT harvard DOT edu>
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Date:	Tue, 17 Nov 2020 18:48:36 -0500
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On 11/17/2020 6:21 PM, Norton Allen wrote:
> On 11/17/2020 5:48 PM, Mark Geisert wrote:
>> Norton Allen wrote:
>>> Is anyone else seeing this? Any suggestions?
>>
>> I'm not seeing it.  'cmake --help' works for me.
>> Does 'ldd /usr/bin/cmake' give any hint? 
>
> ldd did not complain, but your question reminded me that I should try 
> running under strace. That produce the complaint:
>
>    The procedure entry point
>    _ZNSt19basic_ostringstreamlcSt11char_traitslcESalcEEC1Ev could not
>    be located in the dynamic link library C:\cygwin64\bin\cmake.exe
>
> (I had to type that in, as I could not copy from strace's error dialog.)
>
> That looks like it might be an issue with the g++ library? Any chance 
> there was a change in the library that might require a recompile/relink?
>
> I will try rolling that one back. 


Rolling back to gcc-g++ 9.3.0 did not help.

I did find that entry point string in cmake.exe (all the lowercase 'L's 
I typed in that are actually capital i's. My font makes no distinction) 
and I was able to locate a matching string in 
/lib/gcc/x86_64-pc-cygwin/9.3.0/libstdc++.a, but not in libstdc++.dll.a. 
Running strings on the /usr/bin/cygstdc++-6.dll showed the same 
information. Maybe I need to roll back further!


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