Set to ``1`` by the :envvar:`PYTHONDUMPREFS` environment variable.
Need a special build of Python with the ``Py_TRACE_REFS`` macro defined:
- see :option:`configure --with-trace-refs <--with-trace-refs>`.
+ see the :option:`configure --with-trace-refs option <--with-trace-refs>`.
Default: ``0``.
Set to ``1`` by the :envvar:`PYTHONMALLOCSTATS` environment variable.
The option is ignored if Python is :option:`configured using
- --without-pymalloc <--without-pymalloc>`.
+ the --without-pymalloc option <--without-pymalloc>`.
Default: ``0``.
Set by the :envvar:`PYTHONPLATLIBDIR` environment variable.
Default: value of the ``PLATLIBDIR`` macro which is set by the
- :option:`configure --with-platlibdir option <--with-platlibdir>` (default:
- ``"lib"``).
+ :option:`configure --with-platlibdir option <--with-platlibdir>`
+ (default: ``"lib"``).
Part of the :ref:`Python Path Configuration <init-path-config>` input.
$ sudo apt-get install systemtap-sdt-dev
-CPython must then be configured ``--with-dtrace``:
+CPython must then be :option:`configured with the --with-dtrace option
+<--with-dtrace>`:
.. code-block:: none
$ readelf -S ./python | grep .note.stapsdt
[30] .note.stapsdt NOTE 0000000000000000 00308d78
-If you've built Python as a shared library (with --enable-shared), you
+If you've built Python as a shared library
+(with the :option:`--enable-shared` configure option), you
need to look instead within the shared library. For example::
$ readelf -S libpython3.3dm.so.1.0 | grep .note.stapsdt
and the remainder indicates the call/return hierarchy as the script executes.
-For a `--enable-shared` build of CPython, the markers are contained within the
+For a :option:`--enable-shared` build of CPython, the markers are contained within the
libpython shared library, and the probe's dotted path needs to reflect this. For
example, this line from the above example:
.. data:: HAVE_CONTEXTVAR
- The default value is ``True``. If Python is :option:`configured with
- --without-decimal-contextvar <--without-decimal-contextvar>`,
+ The default value is ``True``. If Python is :option:`configured using
+ the --without-decimal-contextvar option <--without-decimal-contextvar>`,
the C version uses a thread-local rather than a coroutine-local context and the value
is ``False``. This is slightly faster in some nested context scenarios.
.. [#f1] The sqlite3 module is not built with loadable extension support by
default, because some platforms (notably Mac OS X) have SQLite
libraries which are compiled without this feature. To get loadable
- extension support, you must pass ``--enable-loadable-sqlite-extensions`` to
- configure.
+ extension support, you must pass the
+ :option:`--enable-loadable-sqlite-extensions` option to configure.
Print low-level information to stderr about the state of CPython's memory
allocator.
- If Python is :option:`configured --with-pydebug <--with-pydebug>`, it also
- performs some expensive internal consistency checks.
+ If Python is `built in debug mode <debug-build>` (:option:`configure
+ --with-pydebug option <--with-pydebug>`), it also performs some expensive
+ internal consistency checks.
.. versionadded:: 3.3
locations for time zone data). On POSIX systems, downstream distributors and
those building Python from source who know where their system
time zone data is deployed may change the default time zone path by specifying
-the compile-time option ``TZPATH`` (or, more likely, the ``configure`` flag
-``--with-tzpath``), which should be a string delimited by :data:`os.pathsep`.
+the compile-time option ``TZPATH`` (or, more likely, the :option:`configure
+flag --with-tzpath <--with-tzpath>`), which should be a string delimited by
+:data:`os.pathsep`.
On all platforms, the configured value is available as the ``TZPATH`` key in
:func:`sysconfig.get_config_var`.
.. cmdoption:: --enable-loadable-sqlite-extensions
Support loadable extensions in the :mod:`_sqlite` extension module (default
- is no), see the :mod:`sqlite3` module.
+ is no).
+
+ See the :meth:`sqlite3.Connection.enable_load_extension` method of the
+ :mod:`sqlite3` module.
.. versionadded:: 3.6
.. cmdoption:: --with-tzpath=<list of absolute paths separated by pathsep>
- Select the default time zone search path for :data:`zoneinfo.TZPATH`,
- see the :mod:`zoneinfo` module.
+ Select the default time zone search path for :data:`zoneinfo.TZPATH`.
+ See the :ref:`Compile-time configuration
+ <zoneinfo_data_compile_time_config>` of the :mod:`zoneinfo` module.
Default: ``/usr/share/zoneinfo:/usr/lib/zoneinfo:/usr/share/lib/zoneinfo:/etc/zoneinfo``.
Enable DTrace support (default is no).
+ See :ref:`Instrumenting CPython with DTrace and SystemTap
+ <instrumentation>`.
+
.. versionadded:: 3.6
.. cmdoption:: --with-address-sanitizer
$ popd
3. Build Python with custom OpenSSL
+ (see the configure `--with-openssl` and `--with-openssl-rpath` options)
.. code-block:: shell-session
van Rossum in :issue:`42927`, based on ideas implemented originally in PyPy
and MicroPython.)
-* When building Python with ``--enable-optimizations`` now
+* When building Python with :option:`--enable-optimizations` now
``-fno-semantic-interposition`` is added to both the compile and link line.
- This speeds builds of the Python interpreter created with ``--enable-shared``
+ This speeds builds of the Python interpreter created with :option:`--enable-shared`
with ``gcc`` by up to 30%. See `this article
<https://developers.redhat.com/blog/2020/06/25/red-hat-enterprise-linux-8-2-brings-faster-python-3-8-run-speeds/>`_
for more details. (Contributed by Victor Stinner and Pablo Galindo in
* The :mod:`atexit` module must now always be built as a built-in module.
(Contributed by Victor Stinner in :issue:`42639`.)
-* Added ``--disable-test-modules`` option to the ``configure`` script:
+* Added :option:`--disable-test-modules` option to the ``configure`` script:
don't build nor install test modules.
(Contributed by Xavier de Gaye, Thomas Petazzoni and Peixing Xin in :issue:`27640`.)
-* Add ``--with-wheel-pkg-dir=PATH`` option to the ``./configure`` script. If
+* Add :option:`--with-wheel-pkg-dir=PATH option <--with-wheel-pkg-dir>`
+ to the ``./configure`` script. If
specified, the :mod:`ensurepip` module looks for ``setuptools`` and ``pip``
wheel packages in this directory: if both are present, these wheel packages
are used instead of ensurepip bundled wheel packages.
(Contributed by Victor Stinner in :issue:`42856`.)
-* Add a new configure ``--without-static-libpython`` option to not build the
- ``libpythonMAJOR.MINOR.a`` static library and not install the ``python.o``
- object file.
+* Add a new :option:`configure --without-static-libpython option
+ <--without-static-libpython>` to not build the ``libpythonMAJOR.MINOR.a``
+ static library and not install the ``python.o`` object file.
(Contributed by Victor Stinner in :issue:`43103`.)
* The ``configure`` script now uses the ``pkg-config`` utility, if available,
to detect the location of Tcl/Tk headers and libraries. As before, those
- locations can be explicitly specified with the ``--with-tcltk-includes``
- and ``--with-tcltk-libs`` configuration options.
+ locations can be explicitly specified with the :option:`--with-tcltk-includes`
+ and :option:`--with-tcltk-libs` configuration options.
(Contributed by Manolis Stamatogiannakis in :issue:`42603`.)
-* Add ``--with-openssl-rpath`` option to ``configure`` script. The option
+* Add :option:`--with-openssl-rpath` option to ``configure`` script. The option
simplifies building Python with a custom OpenSSL installation, e.g.
``./configure --with-openssl=/path/to/openssl --with-openssl-rpath=auto``.
(Contributed by Christian Heimes in :issue:`43466`.)
in debug mode because the :c:type:`PyObject` structure is the same in release
and debug mode since Python 3.8 (see :issue:`36465`).
- The limited C API is still not supported in the ``--with-trace-refs`` special
- build (``Py_TRACE_REFS`` macro).
+ The limited C API is still not supported in the :option:`--with-trace-refs`
+ special build (``Py_TRACE_REFS`` macro).
(Contributed by Victor Stinner in :issue:`43688`.)
* Add the :c:func:`Py_Is(x, y) <Py_Is>` function to test if the *x* object is
non-system Tcl and Tk frameworks if they are installed in
``/Library/Frameworks``, as had been the case on older releases
of macOS. If a macOS SDK is explicitly configured, by using
- ``--enable-universalsdk=`` or ``-isysroot``, only the SDK itself is
+ :option:`--enable-universalsdk` or ``-isysroot``, only the SDK itself is
searched. The default behavior can still be overridden with
- ``--with-tcltk-includes`` and ``--with-tcltk-libs``.
+ :option:`--with-tcltk-includes` and :option:`--with-tcltk-libs`.
(Contributed by Ned Deily in :issue:`34956`.)
* Python can now be built for Windows 10 ARM64.
projects / thirdparty / Python / cpython.git / commitdiff
