png module on max os x

Dear isis-users,

I would love to use the png module of s-lang in ISIS, but there seems to 
be a problem with the libpng library. I receive the following error:

isis> require("png") ;
Error linking to 
/Users/fuerst/bin/slang/lib/slang/v2/modules/png-module.so: 
dlopen(/Users/fuerst/bin/slang/lib/slang/v2/modules/png-module.so, 10): 
Symbol not found: _png_create_info_struct
   Referenced from: 
/Users/fuerst/bin/slang/lib/slang/v2/modules/png-module.so
   Expected in: flat namespace
  in /Users/fuerst/bin/slang/lib/slang/v2/modules/png-module.so
0

This is on a MacBook Pro running Mac OS X 10.7.5. Probably this is has 
to do with a 32bit vs 64bit incompatibility, but I did not find a clear 
solution on the web. I was hoping someone on this list might know a 
solution and can save me some time playing around and re-compiling 
everything several times?

Thank you!

Felix


-- 
Felix Fuerst
ff_at_email.domain.hiddenNuSTAR Science Team
Caltech, Pasadena, CA
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