Hi all,
I'm having an OS X-specific problem with libpyloader. I have a crude  
solution and I'm hoping that someone can shed some light on how  
libpyloader and other libraries like, say, libxpcom are loaded so that  
I can find an elegant solution.

My problem is that my simple Python component fails because  
libpyloader won't load. I'm 95% sure the reason is because  
libpyloader's references to other modules are based on  
@executable_path, e.g. --

    @executable_path/libxpcom.dylib (compatibility version 1.0.0,  
current version 1.0.0)
    @executable_path/XUL (compatibility version 1.0.0, current version  
1.0.0)
    @executable_path/libplds4.dylib (compatibility version 1.0.0,  
current version 1.0.0)
    @executable_path/libplc4.dylib (compatibility version 1.0.0,  
current version 1.0.0)
    @executable_path/libnspr4.dylib (compatibility version 1.0.0,  
current version 1.0.0)


When I invoke my app via Finder, @executable_path = ~/MyApp.app/ 
Contents/MacOS/ and so it is not surprising that these references fail.

The crude solution is to copy /Library/Frameworks/XUL.framework/ 
Versions/Current to ~/MyApp.app/Contents/MacOS/. A nicer solution that  
I think would work (haven't tried it yet) is to use install_name_tool  
to alter the references in libpyloader to this:
    @executable_path/../Frameworks/XUL.framework/Versions/Current/ 
foo.dylib

Which would still require me to make a copy of the XUL framework but  
at least I could put it in a reasonable place inside my app bundle.

What mystifies me is that I also notice that other libraries  
(libxpcom.dylib for example) refer to their subcomponents with  
@executable_path and don't have the same problem as libpyloader on my  
system. I thought that if I could understand why they load properly I  
could maybe get libpyloader to do the same. Any hints/suggestions on  
this topic would be much appreciated.

THanks


PS - I found a similar posting by Scott Robertson here:
http://aspn.activestate.com/ASPN/Mail/Message/pyxpcom/3412662




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