@eht16 Just wondering, doesn't the Windows CI get libstdc++ from somewhere else? In the image below, you can see libstdc++ as installed from the artifact of this PR and below is what is inside msys.
<img width="754" alt="Screenshot 2024-12-04 at 14 02 43" src="https://github.com/user-attachments/assets/6d97e1a2-96df-445e-a7bc-08e80a5b7799">
They have different sizes. When I try to replace the version in Program Files with the msys one, I get
<img width="432" alt="Screenshot 2024-12-04 at 14 05 55" src="https://github.com/user-attachments/assets/0b116b58-c331-4e8f-b487-2848ecf75127">
To me it seems that msys is built against one version of libstdc++ and Geany uses some other from somewhere else.