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1. carlo-bramini

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   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on May 14, 2026
2. carlo-bramini

   added a commit that references this issue on May 14, 2026

   pythongh-149833: Fix wrong prefix on CYGWIN for DLL library name

   1b3a8c9
3. aisk

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   on May 15, 2026
4. github-project-automation

   added this to Unsupported platformson May 15, 2026
5. carlo-bramini

   added a commit that references this issue on May 15, 2026

   pythongh-149833: Fix wrong prefix on CYGWIN for DLL library name

   e924041
6. vstinner commented on May 15, 2026

   

   vstinner

   on May 15, 2026

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   the name of the library should be cygpython$(LDVERSION).dll and not libpython$(LDVERSION).dll

   Alright, the Cygwin documentation says "Cygwin DLLs use the cyg prefix": https://cygwin.com/cygwin-ug-net/dll.html

   The name of your library is ${module}, prefixed with cyg for the DLL and lib for the import library. Cygwin DLLs use the cyg prefix to differentiate them from native-Windows MinGW DLLs, see the MinGW website for more details.
7. vstinner

   added a parent issue on May 15, 2026

   • Enhance Cygwin support #149879
8. vstinner

   added a commit that references this issue on May 15, 2026

   gh-149833: Change DLL prefix to "cygpython" on Cygwin (#149834)

   3fafbc8
9. vstinner

   closed this as completedon May 15, 2026
10. github-project-automation

    moved this to Done in Unsupported platformson May 15, 2026