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annotate Mac/BuildScript/README.txt @ 80661:94de77bd0b4b 2.7

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Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.
author Andrew Svetlov <andrew.svetlov@gmail.com>
date Thu, 29 Nov 2012 19:51:28 +0200
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children c2830debb15a
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1 Building a Python Mac OS X distribution
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2 =======================================
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3
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4 The ``build-install.py`` script creates Python distributions, including
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5 certain third-party libraries as necessary. It builds a complete
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6 framework-based Python out-of-tree, installs it in a funny place with
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7 $DESTROOT, massages that installation to remove .pyc files and such, creates
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8 an Installer package from the installation plus other files in ``resources``
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9 and ``scripts`` and placed that on a ``.dmg`` disk image.
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11 As of Python 2.7.x and 3.2, PSF practice is to build two installer variants
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12 for each release:
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13
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14 1. 32-bit-only, i386 and PPC universal, capable on running on all machines
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15 supported by Mac OS X 10.3.9 through (at least) 10.6::
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16
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17 python build-installer.py \
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18 --sdk-path=/Developer/SDKs/MacOSX10.4u.sdk \
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19 --universal-archs=32-bit \
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20 --dep-target=10.3
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21 # These are the current default options
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22
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23 - builds the following third-party libraries
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24
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25 * Bzip2
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26 * Zlib 1.2.3
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27 * GNU Readline (GPL)
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28 * SQLite 3
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29 * NCurses
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30 * Oracle Sleepycat DB 4.8 (Python 2.x only)
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31
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32 - requires ActiveState ``Tcl/Tk 8.4`` (currently 8.4.19) to be installed for building
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33
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34 - current target build environment:
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35
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36 * Mac OS X 10.5.8 PPC or Intel
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37 * Xcode 3.1.4 (or later)
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38 * ``MacOSX10.4u`` SDK (later SDKs do not support PPC G3 processors)
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39 * ``MACOSX_DEPLOYMENT_TARGET=10.3``
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40 * Apple ``gcc-4.0``
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41 * Python 2.n (n >= 4) for documentation build with Sphinx
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42
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43 - alternate build environments:
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44
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45 * Mac OS X 10.4.11 with Xcode 2.5
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46 * Mac OS X 10.6.6 with Xcode 3.2.5
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47 - need to change ``/System/Library/Frameworks/{Tcl,Tk}.framework/Version/Current`` to ``8.4``
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48
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49 2. 64-bit / 32-bit, x86_64 and i386 universal, for OS X 10.6 (and later)::
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50
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51 python build-installer.py \
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52 --sdk-path=/Developer/SDKs/MacOSX10.6.sdk \
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53 --universal-archs=intel \
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54 --dep-target=10.6
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55
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56 - uses system-supplied versions of third-party libraries
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57
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58 * readline module links with Apple BSD editline (libedit)
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59 * builds Oracle Sleepycat DB 4.8 (Python 2.x only)
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60
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61 - requires ActiveState Tcl/Tk 8.5.9 (or later) to be installed for building
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62
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63 - current target build environment:
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64
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65 * Mac OS X 10.6.6 (or later)
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66 * Xcode 3.2.5 (or later)
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67 * ``MacOSX10.6`` SDK
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68 * ``MACOSX_DEPLOYMENT_TARGET=10.6``
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69 * Apple ``gcc-4.2``
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70 * Python 2.n (n >= 4) for documentation build with Sphinx
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71
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72 - alternate build environments:
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73
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74 * none
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76
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77 General Prerequisites
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78 ---------------------
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79
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80 * No Fink (in ``/sw``) or MacPorts (in ``/opt/local``) or other local
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81 libraries or utilities (in ``/usr/local``) as they could
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82 interfere with the build.
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83
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84 * The documentation for the release is built using Sphinx
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85 because it is included in the installer.
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86
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87 * It is safest to start each variant build with an empty source directory
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88 populated with a fresh copy of the untarred source.
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89
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90
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91 The Recipe
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92 ----------
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93
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94 Here are the steps you need to follow to build a Python installer:
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95
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96 * Run ``build-installer.py``. Optionally you can pass a number of arguments
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97 to specify locations of various files. Please see the top of
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98 ``build-installer.py`` for its usage.
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99
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100 Running this script takes some time, it will not only build Python itself
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101 but also some 3th-party libraries that are needed for extensions.
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102
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103 * When done the script will tell you where the DMG image is (by default
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104 somewhere in ``/tmp/_py``).
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105
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106 Building other universal installers
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107 ...................................
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108
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109 It is also possible to build a 4-way universal installer that runs on
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110 OS X Leopard or later::
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111
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112 python 2.6 /build-installer.py \
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113 --dep-target=10.5
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114 --universal-archs=all
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115 --sdk-path=/Developer/SDKs/MacOSX10.5.sdk
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116
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117 This requires that the deployment target is 10.5, and hence
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118 also that you are building on at least OS X 10.5. 4-way includes
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119 ``i386``, ``x86_64``, ``ppc``, and ``ppc64`` (G5). ``ppc64`` executable
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120 variants can only be run on G5 machines running 10.5. Note that,
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121 while OS X 10.6 is only supported on Intel-based machines, it is possible
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122 to run ``ppc`` (32-bit) executables unmodified thanks to the Rosetta ppc
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123 emulation in OS X 10.5 and 10.6.
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124
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125 Other ``--universal-archs`` options are ``64-bit`` (``x86_64``, ``ppc64``),
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126 and ``3-way`` (``ppc``, ``i386``, ``x86_64``). None of these options
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127 are regularly exercised; use at your own risk.
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128
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129
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130 Testing
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131 -------
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132
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133 Ideally, the resulting binaries should be installed and the test suite run
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134 on all supported OS X releases and architectures. As a practical matter,
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135 that is generally not possible. At a minimum, variant 1 should be run on
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136 at least one Intel, one PPC G4, and one PPC G3 system and one each of
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137 OS X 10.6, 10.5, 10.4, and 10.3.9. Not all tests run on 10.3.9.
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138 Variant 2 should be run on 10.6 in both 32-bit and 64-bit modes.::
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139
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140 arch -i386 /usr/local/bin/pythonn.n -m test.regrtest -w -u all
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141 arch -X86_64 /usr/local/bin/pythonn.n -m test.regrtest -w -u all
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142
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143 Certain tests will be skipped and some cause the interpreter to fail
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144 which will likely generate ``Python quit unexpectedly`` alert messages
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145 to be generated at several points during a test run. These can
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146 be ignored.
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147