The Cygwin/CI is broken.

[clanmills]

Try using cmake to build instead of make.

[codecov]

Codecov Report

Merging #2003 (d6e0740) into 0.27-maintenance (8b0794b) will not change coverage.
The diff coverage is n/a.

@@                Coverage Diff                @@
##           0.27-maintenance    #2003   +/-   ##
=================================================
  Coverage             46.36%   46.36%           
=================================================
  Files                   146      146           
  Lines                 23005    23005           
  Branches              11809    11809           
=================================================
  Hits                  10666    10666           
  Misses                 6689     6689           
  Partials               5650     5650           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8b0794b...d6e0740. Read the comment docs.

[clanmills]

I think c:\Cyginw64\bin\bash is missing. The miserable thing does this:

echo %CMD%
rm -rf build; mkdir -p build; cd build;cmake .. -G 'Unix Makefiles' -DCMAKE_CXX_STANDARD=98 -DCMAKE_CXX_FLAGS=-Wno-deprecated; cmake --build . --config Release; cmake --build . --target python_tests --config Release
cd %APPVEYOR_BUILD_FOLDER%
if "%BUILD%"=="CYGWIN64" C:\cygwin64\bin\bash -c "%CMD%"
Command exited with code 127

It's Thanksgiving today. Tomorrow I'll install a fresh Cygwin64 on Windows. Maybe bash.exe has moved.

https://clanmills.com/states/Thanksgiving/

[clanmills]

And now we know. CMake isn't installed. Right. I'll fix that.

[clanmills]

Another way to ensure you have a working CMake on Cygwin is to build it locally and publish a zip of the the build. Pull down the zip (86mb) with curl and run make install. cmake.exe will be in /usr/local/bin. This will take 30 seconds. Building from source takes about 90 minutes.

[kmilos]

I wonder if we're missing updating the repository info (for both MinGW and Cygwin) before installing packages in order to get the latest packages, or you want to use what Appveyor froze in time on purpose?

Also, for MinGW: might reduce network traffic and speed up the build a bit if installation is done in one pacman -S line instead of the for loop?

[clanmills]

Zee lights ease green. Let's merge and close.

[kmilos]

Will make my suggestions in a new PR then...