Configure Python

Configure Options

List all ./configure script options using:

./configure --help

See also the :file:`Misc/SpecialBuilds.txt` in the Python source distribution.

General Options

.. cmdoption:: --enable-loadable-sqlite-extensions

   Support loadable extensions in the :mod:`_sqlite` extension module (default
   is no).

   See the :meth:`sqlite3.Connection.enable_load_extension` method of the
   :mod:`sqlite3` module.

   .. versionadded:: 3.6

.. cmdoption:: --disable-ipv6

   Disable IPv6 support (enabled by default if supported), see the
   :mod:`socket` module.

.. cmdoption:: --enable-big-digits=[15|30]

   Define the size in bits of Python :class:`int` digits: 15 or 30 bits.

   By default, the number of bits is selected depending on ``sizeof(void*)``:
   30 bits if ``void*`` size is 64-bit or larger, 15 bits otherwise.

   Define the ``PYLONG_BITS_IN_DIGIT`` to ``15`` or ``30``.

   See :data:`sys.int_info.bits_per_digit <sys.int_info>`.

.. cmdoption:: --with-cxx-main

.. cmdoption:: --with-cxx-main=COMPILER

   Compile the Python ``main()`` function and link Python executable with C++
   compiler: ``$CXX``, or *COMPILER* if specified.

.. cmdoption:: --with-suffix=SUFFIX

   Set the Python executable suffix to *SUFFIX*.

   The default suffix is ``.exe`` on Windows and macOS (``python.exe``
   executable), and an empty string on other platforms (``python`` executable).

.. cmdoption:: --with-tzpath=<list of absolute paths separated by pathsep>

   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``.

   See :data:`os.pathsep` path separator.

   .. versionadded:: 3.9

.. cmdoption:: --without-decimal-contextvar

   Build the ``_decimal`` extension module using a thread-local context rather
   than a coroutine-local context (default), see the :mod:`decimal` module.

   See :data:`decimal.HAVE_CONTEXTVAR` and the :mod:`contextvars` module.

   .. versionadded:: 3.9

.. cmdoption:: --with-dbmliborder=db1:db2:...

   Override order to check db backends for the :mod:`dbm` module

   A valid value is a colon (``:``) separated string with the backend names:

   * ``ndbm``;
   * ``gdbm``;
   * ``bdb``.

.. cmdoption:: --without-c-locale-coercion

   Disable C locale coercion to a UTF-8 based locale (enabled by default).

   Don't define the ``PY_COERCE_C_LOCALE`` macro.

   See :envvar:`PYTHONCOERCECLOCALE` and the :pep:`538`.

.. cmdoption:: --with-platlibdir=DIRNAME

   Python library directory name (default is ``lib``).

   Fedora and SuSE use ``lib64`` on 64-bit platforms.

   See :data:`sys.platlibdir`.

   .. versionadded:: 3.9

.. cmdoption:: --with-wheel-pkg-dir=PATH

   Directory of wheel packages used by the :mod:`ensurepip` module
   (none by default).

   Some Linux distribution packaging policies recommend against bundling
   dependencies. For example, Fedora installs wheel packages in the
   ``/usr/share/python-wheels/`` directory and don't install the
   :mod:`ensurepip._bundled` package.

   .. versionadded:: 3.10

.. cmdoption:: --with-vendor-config=config.py

   Path to the vendor config (none by default).

   The vendor config is a Python file that allows configuring some aspects of
   the Python distribution.

   A ``EXTRA_INSTALL_SCHEMES`` dictionary variable can be specified in the
   config to add extra install schemes. These schemes will be picked up by the
   :mod:`sysconfig` module.

   A ``EXTRA_SITE_INSTALL_SCHEMES`` list variable can be specified in the config
   to add extra schemes to the :mod:`site` module initialization. This options
   allow Python distributors to define custom locations to use for their Python
   packages.

   A ``get_preferred_schemes()`` function can be specified in the config. This
   function should return a dict containing preferred scheme names on the
   current platform. Python implementers and redistributors may add their
   preferred schemes to the ``EXTRA_INSTALL_SCHEMES`` vendor config variable,
   and modify this function to return those scheme names, to e.g. provide
   different schemes for system and language package managers to use, so
   packages installed by either do not mix with those by the other.

   .. versionadded:: 3.11

Install Options

.. cmdoption:: --disable-test-modules

   Don't build nor install test modules, like the :mod:`test` package or the
   :mod:`_testcapi` extension module (built and installed by default).

   .. versionadded:: 3.10

.. cmdoption:: --with-ensurepip=[upgrade|install|no]

   Select the :mod:`ensurepip` command run on Python installation:

   * ``upgrade`` (default): run ``python -m ensurepip --altinstall --upgrade``
     command.
   * ``install``: run ``python -m ensurepip --altinstall`` command;
   * ``no``: don't run ensurepip;

   .. versionadded:: 3.6

Performance options

Configuring Python using --enable-optimizations --with-lto (PGO + LTO) is recommended for best performance.

.. cmdoption:: --enable-optimizations

   Enable Profile Guided Optimization (PGO) using :envvar:`PROFILE_TASK`
   (disabled by default).

   The C compiler Clang requires ``llvm-profdata`` program for PGO. On
   macOS, GCC also requires it: GCC is just an alias to Clang on macOS.

   Disable also semantic interposition in libpython if ``--enable-shared`` and
   GCC is used: add ``-fno-semantic-interposition`` to the compiler and linker
   flags.

   .. versionadded:: 3.6

   .. versionchanged:: 3.10
      Use ``-fno-semantic-interposition`` on GCC.

.. envvar:: PROFILE_TASK

   Environment variable used in the Makefile: Python command line arguments for
   the PGO generation task.

   Default: ``-m test --pgo --timeout=$(TESTTIMEOUT)``.

   .. versionadded:: 3.8

.. cmdoption:: --with-lto=[full|thin|no|yes]

   Enable Link Time Optimization (LTO) in any build (disabled by default).

   The C compiler Clang requires ``llvm-ar`` for LTO (``ar`` on macOS), as well
   as an LTO-aware linker (``ld.gold`` or ``lld``).

   .. versionadded:: 3.6

   .. versionadded:: 3.11
      To use ThinLTO feature, use ``--with-lto=thin`` on Clang.

.. cmdoption:: --with-computed-gotos

   Enable computed gotos in evaluation loop (enabled by default on supported
   compilers).

.. cmdoption:: --without-pymalloc

   Disable the specialized Python memory allocator :ref:`pymalloc <pymalloc>`
   (enabled by default).

   See also :envvar:`PYTHONMALLOC` environment variable.

.. cmdoption:: --without-doc-strings

   Disable static documentation strings to reduce the memory footprint (enabled
   by default). Documentation strings defined in Python are not affected.

   Don't define the ``WITH_DOC_STRINGS`` macro.

   See the ``PyDoc_STRVAR()`` macro.

.. cmdoption:: --enable-profiling

   Enable C-level code profiling with ``gprof`` (disabled by default).

Python Debug Build

A debug build is Python built with the :option:`--with-pydebug` configure option.

Effects of a debug build:

Display all warnings by default: the list of default warning filters is empty in the :mod:`warnings` module.
Add d to :data:`sys.abiflags`.
Add :func:`sys.gettotalrefcount` function.
Add :option:`-X showrefcount <-X>` command line option.
Add :envvar:`PYTHONTHREADDEBUG` environment variable.
Add support for the __ltrace__ variable: enable low-level tracing in the bytecode evaluation loop if the variable is defined.
Install :ref:`debug hooks on memory allocators <default-memory-allocators>` to detect buffer overflow and other memory errors.
Define Py_DEBUG and Py_REF_DEBUG macros.
Add runtime checks: code surrounded by #ifdef Py_DEBUG and #endif. Enable assert(...) and _PyObject_ASSERT(...) assertions: don't set the NDEBUG macro (see also the :option:`--with-assertions` configure option). Main runtime checks:
- Add sanity checks on the function arguments.
- Unicode and int objects are created with their memory filled with a pattern to detect usage of uninitialized objects.
- Ensure that functions which can clear or replace the current exception are not called with an exception raised.
- The garbage collector (:func:`gc.collect` function) runs some basic checks on objects consistency.
- The :c:macro:`Py_SAFE_DOWNCAST()` macro checks for integer underflow and overflow when downcasting from wide types to narrow types.

See also the :ref:`Python Development Mode <devmode>` and the :option:`--with-trace-refs` configure option.

.. versionchanged:: 3.8
   Release builds and debug builds are now ABI compatible: defining the
   ``Py_DEBUG`` macro no longer implies the ``Py_TRACE_REFS`` macro (see the
   :option:`--with-trace-refs` option), which introduces the only ABI
   incompatibility.

Debug options

.. cmdoption:: --with-pydebug

   :ref:`Build Python in debug mode <debug-build>`: define the ``Py_DEBUG``
   macro (disabled by default).

.. cmdoption:: --with-trace-refs

   Enable tracing references for debugging purpose (disabled by default).

   Effects:

   * Define the ``Py_TRACE_REFS`` macro.
   * Add :func:`sys.getobjects` function.
   * Add :envvar:`PYTHONDUMPREFS` environment variable.

   This build is not ABI compatible with release build (default build) or debug
   build (``Py_DEBUG`` and ``Py_REF_DEBUG`` macros).

   .. versionadded:: 3.8

.. cmdoption:: --with-assertions

   Build with C assertions enabled (default is no): ``assert(...);`` and
   ``_PyObject_ASSERT(...);``.

   If set, the ``NDEBUG`` macro is not defined in the :envvar:`OPT` compiler
   variable.

   See also the :option:`--with-pydebug` option (:ref:`debug build
   <debug-build>`) which also enables assertions.

   .. versionadded:: 3.6

.. cmdoption:: --with-valgrind

   Enable Valgrind support (default is no).

.. cmdoption:: --with-dtrace

   Enable DTrace support (default is no).

   See :ref:`Instrumenting CPython with DTrace and SystemTap
   <instrumentation>`.

   .. versionadded:: 3.6

.. cmdoption:: --with-address-sanitizer

   Enable AddressSanitizer memory error detector, ``asan`` (default is no).

   .. versionadded:: 3.6

.. cmdoption:: --with-memory-sanitizer

   Enable MemorySanitizer allocation error detector, ``msan`` (default is no).

   .. versionadded:: 3.6

.. cmdoption:: --with-undefined-behavior-sanitizer

   Enable UndefinedBehaviorSanitizer undefined behaviour detector, ``ubsan``
   (default is no).

   .. versionadded:: 3.6

Linker options

.. cmdoption:: --enable-shared

   Enable building a shared Python library: ``libpython`` (default is no).

.. cmdoption:: --without-static-libpython

   Do not build ``libpythonMAJOR.MINOR.a`` and do not install ``python.o``
   (built and enabled by default).

   .. versionadded:: 3.10

Libraries options

.. cmdoption:: --with-libs='lib1 ...'

   Link against additional libraries (default is no).

.. cmdoption:: --with-system-expat

   Build the :mod:`pyexpat` module using an installed ``expat`` library
   (default is no).

.. cmdoption:: --with-system-ffi

   Build the :mod:`_ctypes` extension module using an installed ``ffi``
   library, see the :mod:`ctypes` module (default is system-dependent).

.. cmdoption:: --with-system-libmpdec

   Build the ``_decimal`` extension module using an installed ``mpdec``
   library, see the :mod:`decimal` module (default is no).

   .. versionadded:: 3.3

.. cmdoption:: --with-readline=editline

   Use ``editline`` library for backend of the :mod:`readline` module.

   Define the ``WITH_EDITLINE`` macro.

   .. versionadded:: 3.10

.. cmdoption:: --without-readline

   Don't build the :mod:`readline` module (built by default).

   Don't define the ``HAVE_LIBREADLINE`` macro.

   .. versionadded:: 3.10

.. cmdoption:: --with-tcltk-includes='-I...'

   Override search for Tcl and Tk include files.

.. cmdoption:: --with-tcltk-libs='-L...'

   Override search for Tcl and Tk libraries.

.. cmdoption:: --with-libm=STRING

   Override ``libm`` math library to *STRING* (default is system-dependent).

.. cmdoption:: --with-libc=STRING

   Override ``libc`` C library to *STRING* (default is system-dependent).

.. cmdoption:: --with-openssl=DIR

   Root of the OpenSSL directory.

   .. versionadded:: 3.7

.. cmdoption:: --with-openssl-rpath=[no|auto|DIR]

   Set runtime library directory (rpath) for OpenSSL libraries:

   * ``no`` (default): don't set rpath;
   * ``auto``: auto-detect rpath from :option:`--with-openssl` and
     ``pkg-config``;
   * *DIR*: set an explicit rpath.

   .. versionadded:: 3.10

Security Options

.. cmdoption:: --with-hash-algorithm=[fnv|siphash13|siphash24]

   Select hash algorithm for use in ``Python/pyhash.c``:

   * ``siphash13`` (default);
   * ``siphash24``;
   * ``fnv``.

   .. versionadded:: 3.4

   .. versionadded:: 3.11
      ``siphash13`` is added and it is the new default.

.. cmdoption:: --with-builtin-hashlib-hashes=md5,sha1,sha256,sha512,sha3,blake2

   Built-in hash modules:

   * ``md5``;
   * ``sha1``;
   * ``sha256``;
   * ``sha512``;
   * ``sha3`` (with shake);
   * ``blake2``.

   .. versionadded:: 3.9

.. cmdoption:: --with-ssl-default-suites=[python|openssl|STRING]

   Override the OpenSSL default cipher suites string:

   * ``python`` (default): use Python's preferred selection;
   * ``openssl``: leave OpenSSL's defaults untouched;
   * *STRING*: use a custom string

   See the :mod:`ssl` module.

   .. versionadded:: 3.7

   .. versionchanged:: 3.10

      The settings ``python`` and *STRING* also set TLS 1.2 as minimum
      protocol version.

macOS Options

See Mac/README.rst.

.. cmdoption:: --enable-universalsdk

.. cmdoption:: --enable-universalsdk=SDKDIR

   Create a universal binary build. *SDKDIR* specifies which macOS SDK should
   be used to perform the build (default is no).

.. cmdoption:: --enable-framework

.. cmdoption:: --enable-framework=INSTALLDIR

   Create a Python.framework rather than a traditional Unix install. Optional
   *INSTALLDIR* specifies the installation path (default is no).

.. cmdoption:: --with-universal-archs=ARCH

   Specify the kind of universal binary that should be created. This option is
   only valid when :option:`--enable-universalsdk` is set.

   Options:

   * ``universal2``;
   * ``32-bit``;
   * ``64-bit``;
   * ``3-way``;
   * ``intel``;
   * ``intel-32``;
   * ``intel-64``;
   * ``all``.

.. cmdoption:: --with-framework-name=FRAMEWORK

   Specify the name for the python framework on macOS only valid when
   :option:`--enable-framework` is set (default: ``Python``).

Python Build System

Main files of the build system

:file:`configure.ac` => :file:`configure`;
:file:`Makefile.pre.in` => :file:`Makefile` (created by :file:`configure`);
:file:`pyconfig.h` (created by :file:`configure`);
:file:`Modules/Setup`: C extensions built by the Makefile using :file:`Module/makesetup` shell script;
:file:`setup.py`: C extensions built using the :mod:`distutils` module.

Main build steps

C files (.c) are built as object files (.o).
A static libpython library (.a) is created from objects files.
python.o and the static libpython library are linked into the final python program.
C extensions are built by the Makefile (see :file:`Modules/Setup`) and python setup.py build.

Main Makefile targets

make: Build Python with the standard library.
make platform:: build the python program, but don't build the standard library extension modules.
make profile-opt: build Python using Profile Guided Optimization (PGO). You can use the configure :option:`--enable-optimizations` option to make this the default target of the make command (make all or just make).
make buildbottest: Build Python and run the Python test suite, the same way than buildbots test Python. Set TESTTIMEOUT variable (in seconds) to change the test timeout (1200 by default: 20 minutes).
make install: Build and install Python.
make regen-all: Regenerate (almost) all generated files; make regen-stdlib-module-names and autoconf must be run separately for the remaining generated files.
make clean: Remove built files.
make distclean: Same than make clean, but remove also files created by the configure script.

C extensions

Some C extensions are built as built-in modules, like the sys module. They are built with the Py_BUILD_CORE_BUILTIN macro defined. Built-in modules have no __file__ attribute:

>>> import sys
>>> sys
<module 'sys' (built-in)>
>>> sys.__file__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'sys' has no attribute '__file__'

Other C extensions are built as dynamic libraries, like the _asyncio module. They are built with the Py_BUILD_CORE_MODULE macro defined. Example on Linux x86-64:

>>> import _asyncio
>>> _asyncio
<module '_asyncio' from '/usr/lib64/python3.9/lib-dynload/_asyncio.cpython-39-x86_64-linux-gnu.so'>
>>> _asyncio.__file__
'/usr/lib64/python3.9/lib-dynload/_asyncio.cpython-39-x86_64-linux-gnu.so'

:file:`Modules/Setup` is used to generate Makefile targets to build C extensions. At the beginning of the files, C extensions are built as built-in modules. Extensions defined after the *shared* marker are built as dynamic libraries.

The :file:`setup.py` script only builds C extensions as shared libraries using the :mod:`distutils` module.

The :c:macro:`PyAPI_FUNC()`, :c:macro:`PyAPI_API()` and :c:macro:`PyMODINIT_FUNC()` macros of :file:`Include/pyport.h` are defined differently depending if the Py_BUILD_CORE_MODULE macro is defined:

Use Py_EXPORTED_SYMBOL if the Py_BUILD_CORE_MODULE is defined
Use Py_IMPORTED_SYMBOL otherwise.

If the Py_BUILD_CORE_BUILTIN macro is used by mistake on a C extension built as a shared library, its PyInit_xxx() function is not exported, causing an :exc:`ImportError` on import.

Compiler and linker flags

Options set by the ./configure script and environment variables and used by Makefile.

Preprocessor flags

.. envvar:: CONFIGURE_CPPFLAGS

   Value of :envvar:`CPPFLAGS` variable passed to the ``./configure`` script.

   .. versionadded:: 3.6

.. envvar:: CPPFLAGS

   (Objective) C/C++ preprocessor flags, e.g. ``-I<include dir>`` if you have
   headers in a nonstandard directory ``<include dir>``.

   Both :envvar:`CPPFLAGS` and :envvar:`LDFLAGS` need to contain the shell's
   value for setup.py to be able to build extension modules using the
   directories specified in the environment variables.

.. envvar:: BASECPPFLAGS

   .. versionadded:: 3.4

.. envvar:: PY_CPPFLAGS

   Extra preprocessor flags added for building the interpreter object files.

   Default: ``$(BASECPPFLAGS) -I. -I$(srcdir)/Include $(CONFIGURE_CPPFLAGS) $(CPPFLAGS)``.

   .. versionadded:: 3.2

Compiler flags

.. envvar:: CC

   C compiler command.

   Example: ``gcc -pthread``.

.. envvar:: MAINCC

   C compiler command used to build the ``main()`` function of programs like
   ``python``.

   Variable set by the :option:`--with-cxx-main` option of the configure
   script.

   Default: ``$(CC)``.

.. envvar:: CXX

   C++ compiler command.

   Used if the :option:`--with-cxx-main` option is used.

   Example: ``g++ -pthread``.

.. envvar:: CFLAGS

   C compiler flags.

.. envvar:: CFLAGS_NODIST

   :envvar:`CFLAGS_NODIST` is used for building the interpreter and stdlib C
   extensions.  Use it when a compiler flag should *not* be part of the
   distutils :envvar:`CFLAGS` once Python is installed (:issue:`21121`).

   .. versionadded:: 3.5

.. envvar:: EXTRA_CFLAGS

   Extra C compiler flags.

.. envvar:: CONFIGURE_CFLAGS

   Value of :envvar:`CFLAGS` variable passed to the ``./configure``
   script.

   .. versionadded:: 3.2

.. envvar:: CONFIGURE_CFLAGS_NODIST

   Value of :envvar:`CFLAGS_NODIST` variable passed to the ``./configure``
   script.

   .. versionadded:: 3.5

.. envvar:: BASECFLAGS

   Base compiler flags.

.. envvar:: OPT

   Optimization flags.

.. envvar:: CFLAGS_ALIASING

   Strict or non-strict aliasing flags used to compile ``Python/dtoa.c``.

   .. versionadded:: 3.7

.. envvar:: CCSHARED

   Compiler flags used to build a shared library.

   For example, ``-fPIC`` is used on Linux and on BSD.

.. envvar:: CFLAGSFORSHARED

   Extra C flags added for building the interpreter object files.

   Default: ``$(CCSHARED)`` when :option:`--enable-shared` is used, or an empty
   string otherwise.

.. envvar:: PY_CFLAGS

   Default: ``$(BASECFLAGS) $(OPT) $(CONFIGURE_CFLAGS) $(CFLAGS) $(EXTRA_CFLAGS)``.

.. envvar:: PY_CFLAGS_NODIST

   Default: ``$(CONFIGURE_CFLAGS_NODIST) $(CFLAGS_NODIST) -I$(srcdir)/Include/internal``.

   .. versionadded:: 3.5

.. envvar:: PY_STDMODULE_CFLAGS

   C flags used for building the interpreter object files.

   Default: ``$(PY_CFLAGS) $(PY_CFLAGS_NODIST) $(PY_CPPFLAGS) $(CFLAGSFORSHARED)``.

   .. versionadded:: 3.7

.. envvar:: PY_CORE_CFLAGS

   Default: ``$(PY_STDMODULE_CFLAGS) -DPy_BUILD_CORE``.

   .. versionadded:: 3.2

.. envvar:: PY_BUILTIN_MODULE_CFLAGS

   Compiler flags to build a standard library extension module as a built-in
   module, like the :mod:`posix` module.

   Default: ``$(PY_STDMODULE_CFLAGS) -DPy_BUILD_CORE_BUILTIN``.

   .. versionadded:: 3.8

.. envvar:: PURIFY

   Purify command. Purify is a memory debugger program.

   Default: empty string (not used).

Linker flags

.. envvar:: LINKCC

   Linker command used to build programs like ``python`` and ``_testembed``.

   Default: ``$(PURIFY) $(MAINCC)``.

.. envvar:: CONFIGURE_LDFLAGS

   Value of :envvar:`LDFLAGS` variable passed to the ``./configure`` script.

   Avoid assigning :envvar:`CFLAGS`, :envvar:`LDFLAGS`, etc. so users can use
   them on the command line to append to these values without stomping the
   pre-set values.

   .. versionadded:: 3.2

.. envvar:: LDFLAGS_NODIST

   :envvar:`LDFLAGS_NODIST` is used in the same manner as
   :envvar:`CFLAGS_NODIST`.  Use it when a linker flag should *not* be part of
   the distutils :envvar:`LDFLAGS` once Python is installed (:issue:`35257`).

.. envvar:: CONFIGURE_LDFLAGS_NODIST

   Value of :envvar:`LDFLAGS_NODIST` variable passed to the ``./configure``
   script.

   .. versionadded:: 3.8

.. envvar:: LDFLAGS

   Linker flags, e.g. ``-L<lib dir>`` if you have libraries in a nonstandard
   directory ``<lib dir>``.

   Both :envvar:`CPPFLAGS` and :envvar:`LDFLAGS` need to contain the shell's
   value for setup.py to be able to build extension modules using the
   directories specified in the environment variables.

.. envvar:: LIBS

   Linker flags to pass libraries to the linker when linking the Python
   executable.

   Example: ``-lrt``.

.. envvar:: LDSHARED

   Command to build a shared library.

   Default: ``@LDSHARED@ $(PY_LDFLAGS)``.

.. envvar:: BLDSHARED

   Command to build ``libpython`` shared library.

   Default: ``@BLDSHARED@ $(PY_CORE_LDFLAGS)``.

.. envvar:: PY_LDFLAGS

   Default: ``$(CONFIGURE_LDFLAGS) $(LDFLAGS)``.

.. envvar:: PY_LDFLAGS_NODIST

   Default: ``$(CONFIGURE_LDFLAGS_NODIST) $(LDFLAGS_NODIST)``.

   .. versionadded:: 3.8

.. envvar:: PY_CORE_LDFLAGS

   Linker flags used for building the interpreter object files.

   .. versionadded:: 3.8

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Configure Python

Configure Options

General Options

Install Options

Performance options

Python Debug Build

Debug options

Linker options

Libraries options

Security Options

macOS Options

Python Build System

Main files of the build system

Main build steps

Main Makefile targets

C extensions

Compiler and linker flags

Preprocessor flags

Compiler flags

Linker flags

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Configure Python

Configure Options

General Options

Install Options

Performance options

Python Debug Build

Debug options

Linker options

Libraries options

Security Options

macOS Options

Python Build System

Main files of the build system

Main build steps

Main Makefile targets

C extensions

Compiler and linker flags

Preprocessor flags

Compiler flags

Linker flags