mirror of https://github.com/python/cpython.git
gh-95913: Edit, link and sort 3.11 WhatsNew Build section (GH-98588)
(cherry picked from commit e81fad6b8a)
Co-authored-by: C.A.M. Gerlach <CAM.Gerlach@Gerlach.CAM>
This commit is contained in:
Miss Islington (bot)
Pablo Galindo
parent
cde4cf9de4
commit
c184c6750e
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@ -1896,31 +1896,66 @@ Porting notes for the C API are
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Build Changes
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=============
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* Building Python now requires a C11 compiler. Optional C11 features are not
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required.
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(Contributed by Victor Stinner in :issue:`46656`.)
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* CPython now has :pep:`11` :pep:`Tier 3 support <11#tier-3>` for
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cross compiling to the `WebAssembly <https://webassembly.org/>`_ platforms
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`Emscripten <https://emscripten.org/>`_
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(``wasm32-unknown-emscripten``, i.e. Python in the browser)
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and `WebAssembly System Interface (WASI) <https://wasi.dev/>`_
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(``wasm32-unknown-wasi``).
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The effort is inspired by previous work like `Pyodide <https://pyodide.org/>`_.
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These platforms provide a limited subset of POSIX APIs; Python standard
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libraries features and modules related to networking, processes, threading,
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signals, mmap, and users/groups are not available or don't work.
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(Emscripten contributed by Christian Heimes and Ethan Smith in :gh:`84461`
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and WASI contributed by Christian Heimes in :gh:`90473`;
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platforms promoted in :gh:`95085`)
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* Building Python now requires support of IEEE 754 floating point numbers.
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(Contributed by Victor Stinner in :issue:`46917`.)
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* Building Python now requires:
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* CPython can now be built with the ThinLTO option via ``--with-lto=thin``.
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(Contributed by Dong-hee Na and Brett Holman in :issue:`44340`.)
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* A `C11 <https://en.cppreference.com/w/c/11>`_ compiler.
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`Optional C11 features
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<https://en.wikipedia.org/wiki/C11_(C_standard_revision)#Optional_features>`_
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are not required.
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(Contributed by Victor Stinner in :issue:`46656`.)
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* Support for `IEEE 754 <https://en.wikipedia.org/wiki/IEEE_754>`_
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floating point numbers.
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(Contributed by Victor Stinner in :issue:`46917`.)
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* Support for `floating point Not-a-Number (NaN)
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<https://en.wikipedia.org/wiki/NaN#Floating_point>`_,
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as the :c:macro:`!Py_NO_NAN` macro has been removed.
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(Contributed by Victor Stinner in :issue:`46656`.)
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* A `C99 <https://en.cppreference.com/w/c/99>`_
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``<math.h>`` header file providing the
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:c:func:`!copysign`, :c:func:`!hypot`, :c:func:`!isfinite`,
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:c:func:`!isinf`, :c:func:`!isnan`, and :c:func:`!round` functions
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(contributed by Victor Stinner in :issue:`45440`);
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and a :c:data:`!NAN` constant or the :c:func:`!__builtin_nan` function
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(Contributed by Victor Stinner in :issue:`46640`).
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* The :mod:`tkinter` package now requires `Tcl/Tk <https://www.tcl.tk>`_
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version 8.5.12 or newer.
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(Contributed by Serhiy Storchaka in :issue:`46996`.)
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* Build dependencies, compiler flags, and linker flags for most stdlib
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extension modules are now detected by :program:`configure`. libffi, libnsl,
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libsqlite3, zlib, bzip2, liblzma, libcrypt, Tcl/Tk, and uuid flags
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are detected by `pkg-config
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<https://www.freedesktop.org/wiki/Software/pkg-config/>`_ (when available).
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:mod:`tkinter` now requires a pkg-config command
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to detect development settings for `Tcl/Tk`_ headers and libraries.
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(Contributed by Christian Heimes and Erlend Egeberg Aasland in
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:issue:`45847`, :issue:`45747`, and :issue:`45763`.)
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* libpython is no longer linked against libcrypt.
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(Contributed by Mike Gilbert in :issue:`45433`.)
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* Building Python now requires a C99 ``<math.h>`` header file providing
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the following functions: ``copysign()``, ``hypot()``, ``isfinite()``,
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``isinf()``, ``isnan()``, ``round()``.
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(Contributed by Victor Stinner in :issue:`45440`.)
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* Building Python now requires a C99 ``<math.h>`` header file providing
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a ``NAN`` constant, or the ``__builtin_nan()`` built-in function.
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(Contributed by Victor Stinner in :issue:`46640`.)
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* Building Python now requires support for floating point Not-a-Number (NaN):
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remove the ``Py_NO_NAN`` macro.
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(Contributed by Victor Stinner in :issue:`46656`.)
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* CPython can now be built with the
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`ThinLTO <https://clang.llvm.org/docs/ThinLTO.html>`_ option
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via passing ``thin`` to :option:`--with-lto`, i.e. ``--with-lto=thin``.
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(Contributed by Dong-hee Na and Brett Holman in :issue:`44340`.)
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* Freelists for object structs can now be disabled. A new :program:`configure`
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option :option:`!--without-freelists` can be used to disable all freelists
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@ -1929,55 +1964,30 @@ Build Changes
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* ``Modules/Setup`` and ``Modules/makesetup`` have been improved and tied up.
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Extension modules can now be built through ``makesetup``. All except some
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test modules can be linked statically into main binary or library.
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test modules can be linked statically into a main binary or library.
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(Contributed by Brett Cannon and Christian Heimes in :issue:`45548`,
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:issue:`45570`, :issue:`45571`, and :issue:`43974`.)
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* Build dependencies, compiler flags, and linker flags for most stdlib
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extension modules are now detected by :program:`configure`. libffi, libnsl,
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libsqlite3, zlib, bzip2, liblzma, libcrypt, Tcl/Tk, and uuid flags
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are detected by ``pkg-config`` (when available). :mod:`tkinter` now
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requires ``pkg-config`` command to detect development settings for Tcl/Tk
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headers and libraries.
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(Contributed by Christian Heimes and Erlend Egeberg Aasland in
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:issue:`45847`, :issue:`45747`, and :issue:`45763`.)
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.. note::
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Use the environment variables :envvar:`TCLTK_CFLAGS` and
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:envvar:`TCLTK_LIBS` to manually specify the location of Tcl/Tk headers
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and libraries. The :program:`configure` options ``--with-tcltk-includes``
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and ``--with-tcltk-libs`` have been removed.
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Use the environment variables :envvar:`!TCLTK_CFLAGS` and
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:envvar:`!TCLTK_LIBS` to manually specify the location of Tcl/Tk headers
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and libraries. The :program:`configure` options
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:option:`!--with-tcltk-includes` and :option:`!--with-tcltk-libs`
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have been removed.
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On RHEL 7 and CentOS 7 the development packages do not provide ``tcl.pc``
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and ``tk.pc``, use :envvar:`TCLTK_LIBS="-ltk8.5 -ltkstub8.5 -ltcl8.5"`.
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and ``tk.pc``; use ``TCLTK_LIBS="-ltk8.5 -ltkstub8.5 -ltcl8.5"``.
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The directory ``Misc/rhel7`` contains ``.pc`` files and instructions
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how to build Python with RHEL 7's and CentOS 7's Tcl/Tk and OpenSSL.
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* CPython now has :pep:`11` tier 3 support for cross compiling to WebAssembly
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platform ``wasm32-unknown-emscripten`` (Python in the browser). The effort
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is inspired by previous work like `Pyodide <https://pyodide.org/>`_.
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Emscripten provides a limited subset of POSIX APIs. Python standard
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libraries features and modules related to networking, processes, threading,
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signals, mmap, and users/groups are not available or don't work.
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(Contributed by Christian Heimes and Ethan Smith in :gh:`84461`,
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promoted in :gh:`95085`)
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* CPython now has :pep:`11` tier 3 support for cross compiling to WebAssembly
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platform ``wasm32-unknown-wasi`` (WebAssembly System Interface). Like on
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Emscripten, only a subset of Python's standard library is available on WASI.
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(Contributed by Christian Heimes in :gh:`90473`, promoted in :gh:`95085`)
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on how to build Python with RHEL 7's and CentOS 7's Tcl/Tk and OpenSSL.
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* CPython will now use 30-bit digits by default for the Python :class:`int`
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implementation. Previously, the default was to use 30-bit digits on platforms
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with ``SIZEOF_VOID_P >= 8``, and 15-bit digits otherwise. It's still possible
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to explicitly request use of 15-bit digits via either the
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``--enable-big-digits`` option to the configure script or (for Windows) the
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``PYLONG_BITS_IN_DIGIT`` variable in ``PC/pyconfig.h``, but this option may
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be removed at some point in the future. (Contributed by Mark Dickinson in
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:issue:`45569`.)
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* The :mod:`tkinter` package now requires Tcl/Tk version 8.5.12 or newer.
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(Contributed by Serhiy Storchaka in :issue:`46996`.)
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:option:`--enable-big-digits` option to the configure script
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or (for Windows) the ``PYLONG_BITS_IN_DIGIT`` variable in ``PC/pyconfig.h``,
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but this option may be removed at some point in the future.
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(Contributed by Mark Dickinson in :issue:`45569`.)
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.. _whatsnew311-c-api:
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