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222 lines
8.5 KiB
Text
222 lines
8.5 KiB
Text
Building a Python Mac OS X distribution
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=======================================
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The ``build-install.py`` script creates Python distributions, including
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certain third-party libraries as necessary. It builds a complete
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framework-based Python out-of-tree, installs it in a funny place with
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$DESTROOT, massages that installation to remove .pyc files and such, creates
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an Installer package from the installation plus other files in ``resources``
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and ``scripts`` and placed that on a ``.dmg`` disk image.
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For Python 3.4.0, PSF practice is to build two installer variants
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for each release.
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1. 32-bit-only, i386 and PPC universal, capable on running on all machines
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supported by Mac OS X 10.5 through (at least) 10.9::
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/path/to/bootstrap/python2.7 build-installer.py \
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--sdk-path=/Developer/SDKs/MacOSX10.5.sdk \
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--universal-archs=32-bit \
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--dep-target=10.5
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- builds the following third-party libraries
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* NCurses 5.9 (http://bugs.python.org/issue15037)
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* SQLite 3.8.11
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* XZ 5.0.5
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- uses system-supplied versions of third-party libraries
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* readline module links with Apple BSD editline (libedit)
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- requires ActiveState ``Tcl/Tk 8.4`` (currently 8.4.20) to be installed for building
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- recommended build environment:
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* Mac OS X 10.5.8 Intel or PPC
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* Xcode 3.1.4
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* ``MacOSX10.5`` SDK
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* ``MACOSX_DEPLOYMENT_TARGET=10.5``
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* Apple ``gcc-4.2``
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* bootstrap non-framework Python 2.7 for documentation build with
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Sphinx (as of 3.4.1)
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- alternate build environments:
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* Mac OS X 10.6.8 with Xcode 3.2.6
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- need to change ``/System/Library/Frameworks/{Tcl,Tk}.framework/Version/Current`` to ``8.4``
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* Note Xcode 4.* does not support building for PPC so cannot be used for this build
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2. 64-bit / 32-bit, x86_64 and i386 universal, for OS X 10.6 (and later)::
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/path/to/bootstrap/python2.7 build-installer.py \
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--sdk-path=/Developer/SDKs/MacOSX10.6.sdk \
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--universal-archs=intel \
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--dep-target=10.6
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- builds the following third-party libraries
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* NCurses 5.9 (http://bugs.python.org/issue15037)
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* SQLite 3.8.11
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* XZ 5.0.5
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- uses system-supplied versions of third-party libraries
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* readline module links with Apple BSD editline (libedit)
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- requires ActiveState Tcl/Tk 8.5.15.1 (or later) to be installed for building
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- recommended build environment:
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* Mac OS X 10.6.8 (or later)
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* Xcode 3.2.6
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* ``MacOSX10.6`` SDK
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* ``MACOSX_DEPLOYMENT_TARGET=10.6``
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* Apple ``gcc-4.2``
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* bootstrap non-framework Python 2.7 for documentation build with
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Sphinx (as of 3.4.1)
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- alternate build environments:
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* none. Xcode 4.x currently supplies two C compilers.
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``llvm-gcc-4.2.1`` has been found to miscompile Python 3.3.x and
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produce a non-functional Python executable. As it appears to be
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considered a migration aid by Apple and is not likely to be fixed,
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its use should be avoided. The other compiler, ``clang``, has been
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undergoing rapid development. While it appears to have become
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production-ready in the most recent Xcode 5 releases, the versions
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available on the deprecated Xcode 4.x for 10.6 were early releases
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and did not receive the level of exposure in production environments
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that the Xcode 3 gcc-4.2 compiler has had.
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* For Python 2.7.x and 3.2.x, the 32-bit-only installer was configured to
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support Mac OS X 10.3.9 through (at least) 10.6. Because it is
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believed that there are few systems still running OS X 10.3 or 10.4
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and because it has become increasingly difficult to test and
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support the differences in these earlier systems, as of Python 3.3.0 the PSF
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32-bit installer no longer supports them. For reference in building such
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an installer yourself, the details are::
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/usr/bin/python build-installer.py \
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--sdk-path=/Developer/SDKs/MacOSX10.4u.sdk \
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--universal-archs=32-bit \
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--dep-target=10.3
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- builds the following third-party libraries
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* Bzip2
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* NCurses
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* GNU Readline (GPL)
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* SQLite 3
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* XZ
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* Zlib 1.2.3
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* Oracle Sleepycat DB 4.8 (Python 2.x only)
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- requires ActiveState ``Tcl/Tk 8.4`` (currently 8.4.20) to be installed for building
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- recommended build environment:
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* Mac OS X 10.5.8 PPC or Intel
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* Xcode 3.1.4 (or later)
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* ``MacOSX10.4u`` SDK (later SDKs do not support PPC G3 processors)
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* ``MACOSX_DEPLOYMENT_TARGET=10.3``
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* Apple ``gcc-4.0``
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* system Python 2.5 for documentation build with Sphinx
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- alternate build environments:
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* Mac OS X 10.6.8 with Xcode 3.2.6
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- need to change ``/System/Library/Frameworks/{Tcl,Tk}.framework/Version/Current`` to ``8.4``
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General Prerequisites
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---------------------
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* No Fink (in ``/sw``) or MacPorts (in ``/opt/local``) or other local
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libraries or utilities (in ``/usr/local``) as they could
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interfere with the build.
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* The documentation for the release is built using Sphinx
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because it is included in the installer. For 2.7.x and 3.x.x up to and
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including 3.4.0, the ``Doc/Makefile`` uses ``svn`` to download repos of
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``Sphinx`` and its dependencies. Beginning with 3.4.1, the ``Doc/Makefile``
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assumes there is an externally-provided ``sphinx-build`` and requires at
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least Python 2.6 to run. Because of this, it is no longer possible to
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build a 3.4.1 or later installer on OS X 10.5 using the Apple-supplied
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Python 2.5.
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* It is safest to start each variant build with an empty source directory
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populated with a fresh copy of the untarred source.
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* It is recommended that you remove any existing installed version of the
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Python being built::
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sudo rm -rf /Library/Frameworks/Python.framework/Versions/n.n
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The Recipe
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----------
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Here are the steps you need to follow to build a Python installer:
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* Run ``build-installer.py``. Optionally you can pass a number of arguments
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to specify locations of various files. Please see the top of
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``build-installer.py`` for its usage.
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Running this script takes some time, it will not only build Python itself
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but also some 3th-party libraries that are needed for extensions.
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* When done the script will tell you where the DMG image is (by default
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somewhere in ``/tmp/_py``).
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Building other universal installers
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...................................
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It is also possible to build a 4-way universal installer that runs on
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OS X 10.5 Leopard or later::
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/usr/bin/python /build-installer.py \
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--dep-target=10.5
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--universal-archs=all
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--sdk-path=/Developer/SDKs/MacOSX10.5.sdk
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This requires that the deployment target is 10.5, and hence
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also that you are building on at least OS X 10.5. 4-way includes
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``i386``, ``x86_64``, ``ppc``, and ``ppc64`` (G5). ``ppc64`` executable
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variants can only be run on G5 machines running 10.5. Note that,
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while OS X 10.6 is only supported on Intel-based machines, it is possible
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to run ``ppc`` (32-bit) executables unmodified thanks to the Rosetta ppc
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emulation in OS X 10.5 and 10.6. The 4-way installer variant must be
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built with Xcode 3. It is not regularly built or tested.
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Other ``--universal-archs`` options are ``64-bit`` (``x86_64``, ``ppc64``),
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and ``3-way`` (``ppc``, ``i386``, ``x86_64``). None of these options
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are regularly exercised; use at your own risk.
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Testing
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-------
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Ideally, the resulting binaries should be installed and the test suite run
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on all supported OS X releases and architectures. As a practical matter,
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that is generally not possible. At a minimum, variant 1 should be run on
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a PPC G4 system with OS X 10.5 and at least one Intel system running OS X
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10.9, 10.8, 10.7, 10.6, or 10.5. Variant 2 should be run on 10.9, 10.8,
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10.7, and 10.6 systems in both 32-bit and 64-bit modes.::
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/usr/local/bin/pythonn.n -m test -w -u all,-largefile
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/usr/local/bin/pythonn.n-32 -m test -w -u all
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Certain tests will be skipped and some cause the interpreter to fail
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which will likely generate ``Python quit unexpectedly`` alert messages
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to be generated at several points during a test run. These are normal
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during testing and can be ignored.
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It is also recommend to launch IDLE and verify that it is at least
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functional. Double-click on the IDLE app icon in ``/Applications/Python n.n``.
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It should also be tested from the command line::
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/usr/local/bin/idlen.n
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