Add a note about python 3.8 ABI dropping the m flag (#395)

pypa · Nov 17, 2019 · af77c97 · af77c97
1 parent b9ccfaf
commit af77c97
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diff --git a/README.rst b/README.rst
@@ -121,6 +121,11 @@ The images currently contain:
 - The `auditwheel <https://pypi.python.org/pypi/auditwheel>`_ tool
 
 
+Note that `starting with CPython 3.8 <https://docs.python.org/dev/whatsnew/3.8.html#build-and-c-api-changes>`_,
+default ``sys.abiflags`` became an empty string: the ``m`` flag for pymalloc
+became useless (builds with and without pymalloc are ABI compatible) and so has
+been removed. (e.g. ``/opt/python/cp38-cp38``)
+
 Building Docker images
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