Issue #16407 has been updated by mame (Yusuke Endoh).


I have deleted the github action file for cygwin CI.  That is broken.

https://github.com/ruby/ruby/runs/394774858

```
      0 [main] dirname (5068) C:\tools\cygwin\bin\dirname.exe: *** fatal error - cygheap base mismatch detected - 0x180317408/0x18033F408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
      1 [main] git (3544) C:\tools\cygwin\bin\git.exe: *** fatal error - cygheap base mismatch detected - 0x180317408/0x18033F408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
##[error]Process completed with exit code 127.
```

Adding a platform to the official CI may make users misunderstand that the platform is officially supported.
Please start it on your own repository first, and maintain it for a few month, at least.

----------------------------------------
Misc #16407: Add .github/workflows/cygwin.yml
https://bugs.ruby-lang.org/issues/16407#change-83947

* Author: fd0 (Daisuke Fujimura)
* Status: Closed
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
----------------------------------------
I would like to propose cygwin.yml for x86_64-cygwin CI.


Result (local branch): https://github.com/fd00/ruby/runs/337808124


---Files--------------------------------
cygwin.yml (2.48 KB)


-- 
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