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13 lines
746 B
13 lines
746 B
3 years ago
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## Python extension modules now build with hidden visibility
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Python extension modules are usually expected to only export a single symbol,
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decorated with the `PyMODINIT_FUNC` macro and providing the module entry point.
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On versions of python >= 3.9, the python headers contain GNU symbol visibility
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attributes to mark the init function with default visibility; it is then safe
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to set the [[shared_module]] inherited kwarg `gnu_symbol_visibility: 'hidden'`.
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In the interest of doing the right thing out of the box, this is now the
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default for extension modules for found installations that are new enough to
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have this set, which is not expected to break anything, but remains possible to
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set explicitly (in which case that will take precedence).
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