diff --git a/Doc/whatsnew/3.11.rst b/Doc/whatsnew/3.11.rst index c143a418f3c5b8..3e0eb05704d652 100644 --- a/Doc/whatsnew/3.11.rst +++ b/Doc/whatsnew/3.11.rst @@ -1880,31 +1880,66 @@ Porting notes for the C API are Build Changes ============= -* Building Python now requires a C11 compiler. Optional C11 features are not - required. - (Contributed by Victor Stinner in :issue:`46656`.) - -* Building Python now requires support of IEEE 754 floating point numbers. - (Contributed by Victor Stinner in :issue:`46917`.) +* CPython now has :pep:`11` :pep:`Tier 3 support <11#tier-3>` for + cross compiling to the `WebAssembly `_ platforms + `Emscripten `_ + (``wasm32-unknown-emscripten``, i.e. Python in the browser) + and `WebAssembly System Interface (WASI) `_ + (``wasm32-unknown-wasi``). + The effort is inspired by previous work like `Pyodide `_. + These platforms provide a limited subset of POSIX APIs; Python standard + libraries features and modules related to networking, processes, threading, + signals, mmap, and users/groups are not available or don't work. + (Emscripten contributed by Christian Heimes and Ethan Smith in :gh:`84461` + and WASI contributed by Christian Heimes in :gh:`90473`; + platforms promoted in :gh:`95085`) + +* Building Python now requires: + + * A `C11 `_ compiler. + `Optional C11 features + `_ + are not required. + (Contributed by Victor Stinner in :issue:`46656`.) + + * Support for `IEEE 754 `_ + floating point numbers. + (Contributed by Victor Stinner in :issue:`46917`.) + + * Support for `floating point Not-a-Number (NaN) + `_, + as the :c:macro:`!Py_NO_NAN` macro has been removed. + (Contributed by Victor Stinner in :issue:`46656`.) + + * A `C99 `_ + ```` header file providing the + :c:func:`!copysign`, :c:func:`!hypot`, :c:func:`!isfinite`, + :c:func:`!isinf`, :c:func:`!isnan`, and :c:func:`!round` functions + (contributed by Victor Stinner in :issue:`45440`); + and a :c:data:`!NAN` constant or the :c:func:`!__builtin_nan` function + (Contributed by Victor Stinner in :issue:`46640`). + +* The :mod:`tkinter` package now requires `Tcl/Tk `_ + version 8.5.12 or newer. + (Contributed by Serhiy Storchaka in :issue:`46996`.) -* CPython can now be built with the ThinLTO option via ``--with-lto=thin``. - (Contributed by Dong-hee Na and Brett Holman in :issue:`44340`.) +* Build dependencies, compiler flags, and linker flags for most stdlib + extension modules are now detected by :program:`configure`. libffi, libnsl, + libsqlite3, zlib, bzip2, liblzma, libcrypt, Tcl/Tk, and uuid flags + are detected by `pkg-config + `_ (when available). + :mod:`tkinter` now requires a pkg-config command + to detect development settings for `Tcl/Tk`_ headers and libraries. + (Contributed by Christian Heimes and Erlend Egeberg Aasland in + :issue:`45847`, :issue:`45747`, and :issue:`45763`.) * libpython is no longer linked against libcrypt. (Contributed by Mike Gilbert in :issue:`45433`.) -* Building Python now requires a C99 ```` header file providing - the following functions: ``copysign()``, ``hypot()``, ``isfinite()``, - ``isinf()``, ``isnan()``, ``round()``. - (Contributed by Victor Stinner in :issue:`45440`.) - -* Building Python now requires a C99 ```` header file providing - a ``NAN`` constant, or the ``__builtin_nan()`` built-in function. - (Contributed by Victor Stinner in :issue:`46640`.) - -* Building Python now requires support for floating point Not-a-Number (NaN): - remove the ``Py_NO_NAN`` macro. - (Contributed by Victor Stinner in :issue:`46656`.) +* CPython can now be built with the + `ThinLTO `_ option + via passing ``thin`` to :option:`--with-lto`, i.e. ``--with-lto=thin``. + (Contributed by Dong-hee Na and Brett Holman in :issue:`44340`.) * Freelists for object structs can now be disabled. A new :program:`configure` option :option:`!--without-freelists` can be used to disable all freelists @@ -1913,55 +1948,30 @@ Build Changes * ``Modules/Setup`` and ``Modules/makesetup`` have been improved and tied up. Extension modules can now be built through ``makesetup``. All except some - test modules can be linked statically into main binary or library. + test modules can be linked statically into a main binary or library. (Contributed by Brett Cannon and Christian Heimes in :issue:`45548`, :issue:`45570`, :issue:`45571`, and :issue:`43974`.) -* Build dependencies, compiler flags, and linker flags for most stdlib - extension modules are now detected by :program:`configure`. libffi, libnsl, - libsqlite3, zlib, bzip2, liblzma, libcrypt, Tcl/Tk, and uuid flags - are detected by ``pkg-config`` (when available). :mod:`tkinter` now - requires ``pkg-config`` command to detect development settings for Tcl/Tk - headers and libraries. - (Contributed by Christian Heimes and Erlend Egeberg Aasland in - :issue:`45847`, :issue:`45747`, and :issue:`45763`.) - .. note:: - Use the environment variables :envvar:`TCLTK_CFLAGS` and - :envvar:`TCLTK_LIBS` to manually specify the location of Tcl/Tk headers - and libraries. The :program:`configure` options ``--with-tcltk-includes`` - and ``--with-tcltk-libs`` have been removed. + Use the environment variables :envvar:`!TCLTK_CFLAGS` and + :envvar:`!TCLTK_LIBS` to manually specify the location of Tcl/Tk headers + and libraries. The :program:`configure` options + :option:`!--with-tcltk-includes` and :option:`!--with-tcltk-libs` + have been removed. On RHEL 7 and CentOS 7 the development packages do not provide ``tcl.pc`` - and ``tk.pc``, use :envvar:`TCLTK_LIBS="-ltk8.5 -ltkstub8.5 -ltcl8.5"`. + and ``tk.pc``; use ``TCLTK_LIBS="-ltk8.5 -ltkstub8.5 -ltcl8.5"``. The directory ``Misc/rhel7`` contains ``.pc`` files and instructions - how to build Python with RHEL 7's and CentOS 7's Tcl/Tk and OpenSSL. - -* CPython now has :pep:`11` tier 3 support for cross compiling to WebAssembly - platform ``wasm32-unknown-emscripten`` (Python in the browser). The effort - is inspired by previous work like `Pyodide `_. - Emscripten provides a limited subset of POSIX APIs. Python standard - libraries features and modules related to networking, processes, threading, - signals, mmap, and users/groups are not available or don't work. - (Contributed by Christian Heimes and Ethan Smith in :gh:`84461`, - promoted in :gh:`95085`) - -* CPython now has :pep:`11` tier 3 support for cross compiling to WebAssembly - platform ``wasm32-unknown-wasi`` (WebAssembly System Interface). Like on - Emscripten, only a subset of Python's standard library is available on WASI. - (Contributed by Christian Heimes in :gh:`90473`, promoted in :gh:`95085`) + on how to build Python with RHEL 7's and CentOS 7's Tcl/Tk and OpenSSL. * CPython will now use 30-bit digits by default for the Python :class:`int` implementation. Previously, the default was to use 30-bit digits on platforms with ``SIZEOF_VOID_P >= 8``, and 15-bit digits otherwise. It's still possible to explicitly request use of 15-bit digits via either the - ``--enable-big-digits`` option to the configure script or (for Windows) the - ``PYLONG_BITS_IN_DIGIT`` variable in ``PC/pyconfig.h``, but this option may - be removed at some point in the future. (Contributed by Mark Dickinson in - :issue:`45569`.) - -* The :mod:`tkinter` package now requires Tcl/Tk version 8.5.12 or newer. - (Contributed by Serhiy Storchaka in :issue:`46996`.) + :option:`--enable-big-digits` option to the configure script + or (for Windows) the ``PYLONG_BITS_IN_DIGIT`` variable in ``PC/pyconfig.h``, + but this option may be removed at some point in the future. + (Contributed by Mark Dickinson in :issue:`45569`.) .. _whatsnew311-c-api: pFad - Phonifier reborn

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