From: Victor Stinner <vstinner@redhat.com>
Date: Fri, 26 Apr 2019 15:56:44 +0000 (+0200)
Subject: bpo-36722: Add What's New entry for debug ABI (GH-12957)
X-Git-Tag: v3.8.0a4~86
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=404606974051c5ec093312aa57cf1bcbc52e1d85;p=python

bpo-36722: Add What's New entry for debug ABI (GH-12957)
---

diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst
index 4cb9c4f0f2..444625040a 100644
--- a/Doc/whatsnew/3.8.rst
+++ b/Doc/whatsnew/3.8.rst
@@ -98,6 +98,30 @@ subdirectories).
 
 (Contributed by Carl Meyer in :issue:`33499`.)
 
+Debug build uses the same ABI as release build
+-----------------------------------------------
+
+Python now uses the same ABI when built in release and in debug mode. On Unix,
+when Python is build in debug mode, it is now possible to load C extensions
+built in release mode and C extensions built using the stable ABI.
+
+Release build and debug build are now ABI compatible: the ``Py_DEBUG`` define
+no longer implies the ``Py_TRACE_REFS`` define which introduces the only ABI
+incompatibility. A new ``./configure --with-trace-refs`` build option is now
+required to get ``Py_TRACE_REFS`` define which adds :func:`sys.getobjects`
+function and :envvar:`PYTHONDUMPREFS` environment variable.
+(Contributed by Victor Stinner in :issue:`36465`.)
+
+On Unix, C extensions are no longer linked to libpython. It is now possible to
+load a C extension built using a shared library Python
+with a statically linked Python.
+(Contributed by Victor Stinner in :issue:`21536`.)
+
+On Unix, when Python is built in debug mode, import now also looks for C
+extensions compiled in release mode and for C extensions compiled with the
+stable ABI.
+(Contributed by Victor Stinner in :issue:`36722`.)
+
 
 Other Language Changes
 ======================