This commit was manufactured by cvs2svn to create branch

'release23-maint'.

Mac/OSX/fixapplepython23.py

+"""fixapplepython23 - Fix Apple-installed Python 2.3 (on Mac OS X 10.3)
+
+Python 2.3 (and 2.3.X for X<5) have the problem that building an extension
+for a framework installation may accidentally pick up the framework
+of a newer Python, in stead of the one that was used to build the extension.
+
+This script modifies the Makefile (in .../lib/python2.3/config) to use
+the newer method of linking extensions with "-undefined dynamic_lookup"
+which fixes this problem.
+
+The script will first check all prerequisites, and return a zero exit
+status also when nothing needs to be fixed.
+"""
+import sys
+import os
+import gestalt
+
+MAKEFILE='/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/Makefile'
+CHANGES=((
+    'LDSHARED=\t$(CC) $(LDFLAGS) -bundle -framework $(PYTHONFRAMEWORK)\n',
+    'LDSHARED=\t$(CC) $(LDFLAGS) -bundle -undefined dynamic_lookup\n'
+    ),(
+    'BLDSHARED=\t$(CC) $(LDFLAGS) -bundle -framework $(PYTHONFRAMEWORK)\n',
+    'BLDSHARED=\t$(CC) $(LDFLAGS) -bundle -undefined dynamic_lookup\n'
+    ),(
+    'CC=\t\tgcc\n',
+    'CC=\t\t/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/PantherPythonFix/run-gcc\n'
+    ),(
+    'CXX=\t\tc++\n',
+    'CXX=\t\t/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/PantherPythonFix/run-g++\n'
+))
+
+GCC_SCRIPT='/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/PantherPythonFix/run-gcc'
+GXX_SCRIPT='/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/PantherPythonFix/run-g++'
+SCRIPT="""#!/bin/sh
+export MACOSX_DEPLOYMENT_TARGET=10.3
+exec %s "${@}"
+"""
+
+def findline(lines, start):
+    """return line starting with given string or -1"""
+    for i in range(len(lines)):
+        if lines[i][:len(start)] == start:
+            return i
+    return -1
+    
+def fix(makefile, do_apply):
+    """Fix the Makefile, if required."""
+    fixed = False
+    lines = open(makefile).readlines()
+    
+    for old, new in CHANGES:
+        i = findline(lines, new)
+        if i >= 0:
+            # Already fixed
+            continue
+        i = findline(lines, old)
+        if i < 0:
+            print 'fixapplepython23: Python installation not fixed (appears broken)'
+            print 'fixapplepython23: missing line:', old
+            return 2
+        lines[i] = new
+        fixed = True
+       
+    if fixed:
+        if do_apply:
+            print 'fixapplepython23: Fix to Apple-installed Python 2.3 applied'
+            os.rename(makefile, makefile + '~')
+            open(makefile, 'w').writelines(lines)
+            return 0
+        else:
+            print 'fixapplepython23: Fix to Apple-installed Python 2.3 should be applied'
+            return 1
+    else:
+        print 'fixapplepython23: No fix needed, appears to have been applied before'
+        return 0
+        
+def makescript(filename, compiler):
+    """Create a wrapper script for a compiler"""
+    dirname = os.path.split(filename)[0]
+    if not os.access(dirname, os.X_OK):
+        os.mkdir(dirname, 0755)
+    fp = open(filename, 'w')
+    fp.write(SCRIPT % compiler)
+    fp.close()
+    os.chmod(filename, 0755)
+    print 'fixapplepython23: Created', filename
+    
+def main():
+    # Check for -n option
+    if len(sys.argv) > 1 and sys.argv[1] == '-n':
+        do_apply = False
+    else:
+        do_apply = True
+    # First check OS version
+    if gestalt.gestalt('sysv') < 0x1030:
+        print 'fixapplepython23: no fix needed on MacOSX < 10.3'
+        sys.exit(0)
+    # Test that a framework Python is indeed installed
+    if not os.path.exists(MAKEFILE):
+        print 'fixapplepython23: Python framework does not appear to be installed (?), nothing fixed'
+        sys.exit(0)
+    # Check that we can actually write the file
+    if do_apply and not os.access(MAKEFILE, os.W_OK):
+        print 'fixapplepython23: No write permission, please run with "sudo"'
+        sys.exit(2)
+    # Create the shell scripts
+    if do_apply:
+        if not os.access(GCC_SCRIPT, os.X_OK):
+            makescript(GCC_SCRIPT, "gcc")
+        if not os.access(GXX_SCRIPT, os.X_OK):
+            makescript(GXX_SCRIPT, "g++")
+    #  Finally fix the makefile
+    rv = fix(MAKEFILE, do_apply)
+    sys.exit(rv)
+    
+if __name__ == '__main__':
+    main()
+