20211017

• x86_64-apple-darwin distributions are now compiled against macOS SDK 11.1 (downgraded from 11.3). This restores build compatibility with Xcode present in many macOS 10.15 environments.
• LLVM/Clang upgraded from 12.0.1 to 13.0.0.
• PYTHON.json files now properly annotate system library and framework linking requirements for the Python core. Previously, only extensions had their link requirements annotated. This missing annotations meant that it was possible for some libraries to not be linked explicitly and for there to be missing libraries/symbols at link time.
• xcb-proto upgraded from 1.13 to 1.14.1.
• Linux binaries no longer use pthread_yield(), ensuring they re-link with glibc 2.34, which deprecated this symbol. (Due to glibc symbol visibility, older distributions will run on glibc 2.34+: they just couldn't be re-linked against 2.34+.)

This release was made a few days after 20211012 and is more tested than that release. It's release notes may be worth reading.

20211012

• Initial release with CPython 3.10 final (3.10.0)
• CPython 3.9.6 upgraded to 3.9.7.
• CPython 3.8.11 upgraded to 3.8.12.
• pip upgraded from 21.1.3 to 21.2.4.
• setuptools upgraded from 57.4.0 to 58.1.0.
• OpenSSL upgraded from 1.1.1k to 1.1.1l.
• libedit upgraded from 20210714-3.1 to 20210910-3.1.
• gdbm upgraded from 1.18.1 to 1.21.
• macOS builds are all now produced on macOS 11 against the 11.3 SDK. x86_64 builds still target macOS 10.9+.
• Cross-compiled Linux distributions should now have a functional pip install.
• Windows distributions no longer have pip.exe executables since they didn't work.
• CPython 3.10 builds use libedit instead of readline as the backend for the readline extension. This effectively removes a GPL dependency.
• CPython 3.10 no longer contains the _gdbm extension.
• CPython 3.10 builds no longer link against any GPL licensed components and should no longer be subject to copyleft licensing.

This was a significant release. But it was superseded a few days later by 20211017. This release wasn't as well tested and it is encouraged to use the 20211017 release instead.

20210724

• CPython 3.8 upgraded from 3.8.10 to 3.8.11.
• CPython 3.9 upgraded from 3.9.5 to 3.9.6.
• LLVM/Clang upgraded from 12.0.0 to 12.0.1.
• libedit upgraded from 20210216-3.1 to 20210714-3.1.
• LibreSSL upgraded from 3.2.5 to 3.3.3.
• pip upgraded from 21.1.1 to 21.1.3.
• setuptools upgraded from 56.1.0 to 57.4.0.
• SQLite upgraded from 3.35.5 to 3.36.0.
• Shebangs in scripts have been rewritten so they should now pick up the Python distribution in the archive. This means pip3 and other Python scripts should now work correctly.
• CoreFoundation is properly listed as a tkinter dependency in macOS distributions.
• ELF binaries in Linux distributions have a / in DT_NEEDED to force relative path loading.
• macOS distributions now reference /private/etc/ssl as the OpenSSL directory.
• macOS distributions no longer build libedit and ncurses and instead use the system installed libraries.
• There are now various *-install_only-*.tar.gz release artifacts containing a gzipped tar archive of just the Python installation. These artifacts can be more readily consumed by tools just wanting to run a Python interpreter.

20210506

• CPython upgraded from 3.8.9 to 3.8.10 and 3.9.4 to 3.9.5
• LLVM/Clang upgraded from 11.1.0 to 12.0.0
• SQLite upgraded from 3.35.4 to 3.35.5
• pip upgraded from 20.0.1 to 21.1.1
• setuptools upgraded from 56.0.0 to 56.1.0
• reallocarray() is now disabled in musl Linux distributions to provide linking compatibility with older versions of musl libc lacking this symbol

20210415

• CPython 3.9.3 upgraded to 3.9.4.
• Setuptools upgraded from 54.2.0 to 56.0.0.

20210414

• CPython upgraded to 3.9.3 and 3.8.9.
• ctypes extension is now usable on more architectures (see #76).
• SQLite upgraded to 3.35.4.
• GCC upgraded to 10.3.0.
• Various tweaks to the build system to make dependency detection more robust.
• The Rust distribution verifier can now optionally run Python interpreter tests to validate distribution behavior.

20210327

• Setuptools upgraded to 54.2.0
• The libedit variant of the readline extension on Linux no longer references an undefined rl_callback_sigcleanup symbol.

20210325

• nis extension is no longer built on Linux. This extension was adding a dependency on libnsl, which isn't part of the Linux Standard Base. Modern Linux distributions are dropping libnsl from the base install, leading to missing libraries at run-time. See discussion in #51 for more.
• macOS Python 3.8 is now built against the 10.15 SDK instead of 11.x.
• PYTHON.json version incremented to 7 to add Apple SDK metadata.
• musl libc upgraded to 1.2.2.
• setuptools upgraded to 54.1.1.
• LibreSSL upgraded to 3.2.5.
• OpenSSL upgraded to 1.1.1k.
• SQLite upgraded to 3.35.2.

20210303

• LLVM/Clang updated to 11.1.0.
• preadv() and pwritev() are now disabled on x86_64-apple-darwin builds to restore compatibility with macOS < 11.0.
• Windows static distributions now distribute libffi.lib and the _ctypes extension properly has a dependency on its annotated in PYTHON.json. This should fix issues generating a new library from object files when using metadata from PYTHON.json.
• Windows distributions now have pythoncore annotated as linking against pathcch. This dependency was introduced in Python 3.9 and its previous lack of annotation in PYTHON.json resulted in missing symbols when linking pythoncore.

20210228

• i686-unknown-linux-gnu distributions (32-bit x86) are now being produced.
• aarch64-apple-darwin distributions (Apple ARM devices running macOS) are now being produced. These distributions are considered beta quality and there may be some rough edges.
• aarch64-apple-ios and x86_64-apple-ios distributions (iOS and iOS Simulator) are now being produced. These distributions are considered alpha quality and there are known deficiencies. They have not been thoroughly tested.
• Support for building CPython 3.10 alpha releases on Linux has been implemented. These distributions have not been thoroughly tested.
• Linux GNU distributions now link against ld-linux-x86-64.so.2. Please file an issue if this introduces problems.
• binutils updated from version 2.35.1 to 2.36.1.
• LLVM/Clang updated from version 11.0.0 to 11.0.1.
• CPython updated from versions 3.8.7 to 3.8.8 and 3.9.1 to 3.9.2.
• libedit updated from version 20191231-3.1 to 20210216-3.1.
• LibreSSL updated from version 3.2.3 to 3.2.4.
• OpenSSL updated from version 1.1.1i to 1.1.1j (this includes some CVE / security fixes).
• pip updated from version 20.3.3 to 21.0.1.
• readline updated from version 8.0 to 8.1.
• setuptools updated from version 51.1.1 to 53.0.0.
• SQLite updated from version 3.34.0.0 to 3.34.1.0.