[Python-checkins] bpo-36707: Document "m" removal from sys.abiflags (GH-14090)
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Fri Jun 14 21:24:45 EDT 2019
author: Victor Stinner <vstinner at redhat.com>
committer: GitHub <noreply at github.com>
bpo-36707: Document "m" removal from sys.abiflags (GH-14090)
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 817c3f1e56f9..c073431c8948 100644
@@ -16,6 +16,10 @@ always available.
On POSIX systems where Python was built with the standard ``configure``
script, this contains the ABI flags as specified by :pep:`3149`.
+ .. versionchanged:: 3.8
+ Default flags became an empty string (``m`` flag for pymalloc has been
.. versionadded:: 3.2
diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst
index b63bcef5de47..cc3fb76e9c55 100644
@@ -955,6 +955,22 @@ Optimizations
Build and C API Changes
+* Default :data:`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. (Contributed by Victor Stinner in :issue:`36707`.)
+ Example of changes:
+ * Only ``python3.8`` program is installed, ``python3.8m`` program is gone.
+ * Only ``python3.8-config`` script is installed, ``python3.8m-config`` script
+ is gone.
+ * The ``m`` flag has been removed from the suffix of dynamic library
+ filenames: extension modules in the standard library as well as those
+ produced and installed by third-party packages, like those downloaded from
+ PyPI. On Linux, for example, the Python 3.7 suffix
+ ``.cpython-37m-x86_64-linux-gnu.so`` became
+ ``.cpython-38-x86_64-linux-gnu.so`` in Python 3.8.
* The header files have been reorganized to better separate the different kinds
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