cmake suddenly stopped working

[Norton Allen]

On 11/18/2020 11:35 AM, Marco Atzeri via Cygwin wrote:
> can you try to re-install libstdc++6 ?
>
> $ cygcheck -f /usr/bin/cmake.exe
> cmake-3.17.3-2
>
> $ cygcheck -f /usr/bin/cygstdc++-6.dll
> libstdc++6-10.2.0-1

Hmm, here's a problem:

   $ cygcheck -f /usr/bin/cygstdc++-6.dll
   libstdc++6-7.4.0-1

This is after doing a reinstall selecting 10.2.0-1 (twice!). Setup 
thinks I have 10.2.0-1 installed (i.e. that's what is displayed as 
current in the GUI), but /etc/setup/installed.db says:

   $ grep stdc /etc/setup/installed.db
   libstdc++6 libstdc++6-7.4.0-1.tar.bz2 0

Hmmm. I've been using a scripted setup procedure that automatically 
downloads the setup program and then starts it with specific arguments. 
For some reason that did not do what I thought it was doing (or what 
*it* thought it was doing).

I did it manually, and low and behold, many packages needed to be updated.

And now everything seems to be behaving as it ought to.

Thanks all for all suggestions offered!