Link against limited API DLL under Cygwin when abi3 is used #5574
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lazka
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Given that this will break cygwin builds until upstream ships libpython3.dll, should we enable this only with mingw / msys2 for now? |
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Fair question, I think it's fine because:
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Like with Windows Python, we need to link to a different DLL which exports the limited API when using abi3. This makes pyo3 link against libpython3.dll instead of libpython3.X.dll when abi3 is enabled. Note: The limited API DLL is currently not provided in cygwin upstream, but only in MSYS2 (downstream): msys2/MSYS2-packages#5751 I've contacted upstream about this change https://cygwin.com/pipermail/cygwin-apps/2025-October/044659.html
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Thanks, looking at your maillist thread, seems like we are ok to proceed to merge here? |
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(not sure if that question was directed at me, but I agree) |
davidhewitt
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Like with Windows Python, we need to link to a different DLL which exports the limited API when using abi3. This makes pyo3 link against libpython3.dll instead of libpython3.X.dll when abi3 is enabled. Note: The limited API DLL is currently not provided in cygwin upstream, but only in MSYS2 (downstream): msys2/MSYS2-packages#5751 I've contacted upstream about this change https://cygwin.com/pipermail/cygwin-apps/2025-October/044659.html
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Like with Windows Python, we need to link to a different DLL which exports the limited API when using abi3.
This makes pyo3 link against libpython3.dll instead of libpython3.X.dll when abi3 is enabled.
Note: The limited API DLL is currently not provided in cygwin upstream, but only in MSYS2 (downstream):
msys2/MSYS2-packages#5751
I've contacted upstream about this change
https://cygwin.com/pipermail/cygwin-apps/2025-October/044659.html
With #5571 and this python-cryptography builds without changes to pyo3.