This is a replacement buildsystem for CPython. The existing (autotools based) buildsystem for CPython is overcomplicated and makes cross-compiling very difficult.
This cmake-based buildsystem is better because:
- It's much faster to compile: 7 seconds instead of 58 seconds in my unscientific test.
- No compiled program for the target architecture is used in the build itself. This makes cross-compiling possible.
- Same project files for all platforms - there's no need to maintain the unix build separately from four different MSVC builds.
How to use this buildsystem:
- Download and extract the Python 2.7.3 source
VERSION=2.7.3
mkdir -p ~/scratch
cd ~/scratch
curl -L -O http://www.python.org/ftp/python/$VERSION/Python-$VERSION.tgz
md5sum Python-$VERSION.tgz
tar -xzvf Python-$VERSION.tgzExpected MD5: 2cf641732ac23b18d139be077bd906cd
- Checkout the buildsystem
cd ~/scratch
git clone git://github.com/davidsansome/python-cmake-buildsystem- Build
cd ~/scratch
mkdir -p python-build && mkdir -p python-install
cd python-build
cmake -DCMAKE_INSTALL_PREFIX:PATH=${HOME}/scratch/python-install ../python-cmake-buildsystem
make -j10
make installYou can pass options to CMake to control the way Python is built. You only need to give each option once - they get saved in CMakeCache.txt. Pass options on the commandline with -DOPTION=VALUE, or use the "ccmake" gui.
CMAKE_BUILD_TYPE=Debug|Release
Build with debugging symbols or with optimisations.
CMAKE_INSTALL_PREFIX=<path> (defaults to /usr/local)
Path in which to install Python.
BUILD_SHARED=ON|OFF (defaults to OFF)
BUILD_STATIC=ON|OFF (defaults to ON)
Build libpython as a shared library (.so or .dll) or a static library
(.a). At least one of these options must be set to ON - if they are both
set to ON then the Python executable will be linked against the shared
version of libpython.
Note that Python extensions are always built as shared libraries. On
Windows it is not possible to build shared .dll extensions against a
static libpython, so you must build any extensions you want into libpython
itself (see the BUILTIN flags below).
ENABLE_<extension>=ON|OFF (defaults to ON)
BUILTIN_<extension>=ON|OFF (defaults to OFF except for POSIX, PWD and
NT extensions which are builtin by default)
These two options control how individual python extensions are built.
<extension> is the name of the extension in upper case, and without any
leading underscore (_). Known extensions for 2.7.3 include:
ARRAY AUDIOOP BINASCII BISECT BSDDB BZ2 CMATH CODECS_CN CODECS_HK
CODECS_ISO2022 CODECS_JP CODECS_KR CODECS_TW COLLECTIONS CPICKLE CRYPT
CSTRINGIO CSV CTYPES CTYPES_TEST CURSES CURSES_PANEL DATETIME DBM
ELEMENTTREE FCNTL FUNCTOOLS FUTURE_BUILTINS GDBM GRP HASHLIB HEAPQ
HOTSHOT IO ITERTOOLS JSON LINUXAUDIODEV LOCALE LSPROF MATH MMAP
MULTIBYTECODEC MULTIPROCESSING NIS NT OPERATOR OSSAUDIODEV PARSER POSIX
PWD PYEXPAT RANDOM READLINE RESOURCE SELECT SOCKET SPWD SQLITE3 SSL
STROP STRUCT SYSLOG TERMIOS TESTCAPI TIME TKINTER UNICODEDATA ZLIB
All extensions are enabled by default, but some might depend on system
libraries and will get disabled if they're not available (a list of
extensions that didn't have all their prerequisites available will be
printed when you run cmake).
By default extensions are compiled as separate shared libraries (.so or
.dll files) and installed in lib/python2.7/lib-dynload. If you set
BUILTIN_<extension> to ON then the extension is compiled into libpython
instead.
USE_LIB64=ON|OFF (defaults to OFF)
If this is set to ON then cmake will look for dependencies in lib64 as
well as lib directories. Compiled python extensions will also be
installed into lib64/python2.7/lib-dynload instead of
lib/python2.7/lib-dynload.
EXTRA_PYTHONPATH=dir1:dir2 (defaults to "")
Colon (:) separated list of extra directories to add to the compiled-in
PYTHONPATH.
USE_SYSTEM_LIBRARIES=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect system libraries will be done.
Options documented below allow to enable/disable detection of particular
libraries.
USE_SYSTEM_Curses=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect Curses libraries will be done.
Associated python extensions are: CURSES, CURSES_PANEL, READLINE
Following CMake variables can manually be set: CURSES_LIBRARIES
USE_SYSTEM_EXPAT=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect Expat libraries will be done.
Associated python extensions are: ELEMENTTREE, PYEXPAT
Following CMake variables can manually be set: EXPAT_LIBRARIES, EXPAT_INCLUDE_DIRS
USE_SYSTEM_OpenSSL=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect OpenSSL libraries will be done.
Associated python extensions are: HASHLIB, SSL, MD5, SHA, SHA256, SHA512
Following CMake variables can manually be set: OPENSSL_INCLUDE_DIR, OPENSSL_LIBRARIES
If [OPENSSL_INCLUDE_DIR, OPENSSL_LIBRARIES] are found, extensions [HASHLIB, SSL] will be built
If [OPENSSL_INCLUDE_DIR, OPENSSL_LIBRARIES] are NOT found, extensions [SHA, SHA256, SHA512] will be built
USE_SYSTEM_TCL=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect Tcl libraries will be done.
Associated python extensions are: TKINTER
Following CMake variables can manually be set: TCL_LIBRARY, TK_LIBRARY, TCL_INCLUDE_PATH, TK_INCLUDE_PATH
USE_SYSTEM_ZLIB=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect ZLIB libraries will be done.
Associated python extensions are: BINASCII, ZLIB
Following CMake variables can manually be set: ZLIB_LIBRARY, ZLIB_INCLUDE_DIR, ZLIB_ROOT
ZLIB_ROOT should be set only if USE_SYSTEM_ZLIB is ON
If [ZLIB_LIBRARY, ZLIB_INCLUDE_DIR] are found, extensions [BINASCII] will be built with ZLIB_CRC32
USE_SYSTEM_DB=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect DB libraries will be done.
Associated python extensions are: BSDDB
Following CMake variables can manually be set: DB_INCLUDE_PATH, DB_LIBRARIES
USE_SYSTEM_GDBM=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect GDBM libraries will be done.
Associated python extensions are: DBM, GDBM
Following CMake variables can manually be set: GDBM_INCLUDE_PATH, GDBM_LIBRARY, GDBM_COMPAT_LIBRARY
USE_SYSTEM_READLINE=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect Readline libraries will be done.
Associated python extensions are: READLINE
Following CMake variables can manually be set: READLINE_INCLUDE_PATH, READLINE_LIBRARY
USE_SYSTEM_SQLITE3=ON|OFF (defaults to ON)
If set to OFF, no attempt to detect SQLITE3 libraries will be done.
Associated python extensions are: SQLITE3
Following CMake variables can manually be set: SQLITE3_INCLUDE_PATH, SQLITE3_LIBRARY
There are some patches in the cmake/patches-win32 directory that make it possible to compile Python using the mingw32 compiler. You have to apply these before running make:
patch -p0 < cmake/patches-win32/01-dynload_win.patch patch -p0 < cmake/patches-win32/02-signalmodule.patch patch -p0 < cmake/patches-win32/03-mingw32.patch
Note: This branch is for Python version 2.7.3. Since this buildsystem is maintained separately from Python itself it needs to be manually updated whenever there is a new release of Python.
Materials in this repository are distributed under the following licenses:
All software is licensed under the Apache 2.0 License. See LICENSE_Apache_20 file for details.
From the python.org wiki, the answer to the question What if I want to contribute my code to the PSF mentions that if code is going to end up in Python or the standard library, the PSF will require you to license code under "Academic Free License" or "Apache License 2.0".