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6116f07fdc
needs to run it in the Makefile). After installing a newer framework Python the apple-installed Python can no longer build extension modules, because they will inadvertantly be linked against the newer framework. This script modifies lib/config/Makefile so it will link extensions with "-undefined dynamic_lookup", which forestalls this problem. Will backport to 2.4 and 2.3.
95 lines
3.3 KiB
Python
95 lines
3.3 KiB
Python
"""fixapplepython23 - Fix Apple-installed Python 2.3 (on Mac OS X 10.3)
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Python 2.3 (and 2.3.X for X<5) have the problem that building an extension
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for a framework installation may accidentally pick up the framework
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of a newer Python, in stead of the one that was used to build the extension.
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This script modifies the Makefile (in .../lib/python2.3/config) to use
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the newer method of linking extensions with "-undefined dynamic_lookup"
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which fixes this problem.
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The script will first check all prerequisites, and return a zero exit
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status also when nothing needs to be fixed.
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"""
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import sys
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import os
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import gestalt
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MAKEFILE='/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/Makefile'
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OLD_LDSHARED='LDSHARED=\t$(CC) $(LDFLAGS) -bundle -framework $(PYTHONFRAMEWORK)\n'
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OLD_BLDSHARED='B' + OLD_LDSHARED
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NEW_LDSHARED='LDSHARED=\t$(CC) $(LDFLAGS) -bundle -undefined dynamic_lookup\n'
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NEW_BLDSHARED='B' + NEW_LDSHARED
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def findline(lines, start):
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"""return line starting with given string or -1"""
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for i in range(len(lines)):
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if lines[i][:len(start)] == start:
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return i
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return -1
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def fix(makefile, do_apply):
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"""Fix the Makefile, if required."""
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fixed = False
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lines = open(makefile).readlines()
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i = findline(lines, 'LDSHARED=')
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if i < 0:
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print 'fixapplepython23: Python installation not fixed (appears broken, no LDSHARED)'
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return 2
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if lines[i] == OLD_LDSHARED:
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lines[i] = NEW_LDSHARED
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fixed = True
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elif lines[i] != NEW_LDSHARED:
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print 'fixapplepython23: Python installation not fixed (appears modified, unexpected LDSHARED)'
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return 2
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i = findline(lines, 'BLDSHARED=')
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if i < 0:
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print 'fixapplepython23: Python installation not fixed (appears broken, no BLDSHARED)'
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return 2
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if lines[i] == OLD_BLDSHARED:
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lines[i] = NEW_BLDSHARED
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fixed = True
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elif lines[i] != NEW_BLDSHARED:
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print 'fixapplepython23: Python installation not fixed (appears modified, unexpected BLDSHARED)'
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return 2
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if fixed:
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if do_apply:
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print 'fixapplepython23: Fix to Apple-installed Python 2.3 applied'
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os.rename(makefile, makefile + '~')
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open(makefile, 'w').writelines(lines)
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return 0
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else:
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print 'fixapplepython23: Fix to Apple-installed Python 2.3 should be applied'
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return 1
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else:
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print 'fixapplepython23: No fix needed, appears to have been applied before'
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return 0
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def main():
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# Check for -n option
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if len(sys.argv) > 1 and sys.argv[1] == '-n':
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do_apply = False
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else:
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do_apply = True
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# First check OS version
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if gestalt.gestalt('sysv') < 0x1030:
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print 'fixapplepython23: no fix needed on MacOSX < 10.3'
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sys.exit(0)
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# Test that a framework Python is indeed installed
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if not os.path.exists(MAKEFILE):
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print 'fixapplepython23: Python framework does not appear to be installed (?), nothing fixed'
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sys.exit(0)
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# Check that we can actually write the file
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if do_apply and not os.access(MAKEFILE, os.W_OK):
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print 'fixapplepython23: No write permission, please run with "sudo"'
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sys.exit(2)
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# And finally fix it
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rv = fix(MAKEFILE, do_apply)
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sys.exit(rv)
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if __name__ == '__main__':
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main()
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