[ruby-core:121800] [Ruby Bug#21286] Windows - MSYS2 just updated to GCC 15.1.0, builds failing

Issue #21286 has been updated by johnnyshields (Johnny Shields).


May this please be backported to all actively maintained versions (3.2, 3.3, 3.4)? Since MSYS2 in independent of Ruby, users installing any Ruby version on Windows will face the same problem (inability to compile native gems).

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Bug #21286: Windows - MSYS2 just updated to GCC 15.1.0, builds failing
https://bugs.ruby-lang.org/issues/21286#change-112865

* Author: MSP-Greg (Greg L)
* Status: Closed
* ruby -v: master
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
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MSYS2 just updated to GCC 15.1.0, and the ruby-loco builds failed to compile.

See [MinGW](https://github.com/MSP-Greg/ruby-loco/actions/runs/14693708990/job/41232509740) & [UCRT](https://github.com/MSP-Greg/ruby-loco/actions/runs/14693775816/job/41232662025)

Also, I compiled mswin locally with the recent VS 'preview' release, and the bug has been fixed.



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