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# (sysconfig.py)

    # On MacOSX we need to check the setting of the environment variable
    # MACOSX_DEPLOYMENT_TARGET: configure bases some choices on it so
    # it needs to be compatible.

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# (unixcompiler.py)

        # XXX Hackish, at the very least.  See Python bug #445902:
        # http://sourceforge.net/tracker/index.php
        #   ?func=detail&aid=445902&group_id=5470&atid=105470
        # Linkers on different platforms need different options to
        # specify that directories need to be added to the list of
        # directories searched for dependencies when a dynamic library
        # is sought.  GCC has to be told to pass the -R option through
        # to the linker, whereas other compilers just know this.
        # Other compilers may need something slightly different.  At
        # this time, there's no way to determine this information from
        # the configuration data stored in the Python installation, so
        # we use this hack.
        compiler = os.path.basename(sysconfig.get_config_var("CC"))
        if sys.platform[:6] == "darwin":
            # MacOSX's linker doesn't understand the -R flag at all
            return "-L" + dir