thanks a lot Brandon, it solved the problem
but should I make aliases for every Mac Ports software in order to NOT use the 
system /usr/lib libs ?
such as
echo DYLD_LIBRARY_PATH && xemacs ?
is there a better way for that ?

On Dec 12, 2011, at 9:40 AM, Brandon Allbery wrote:

> 2011/12/12 Benoît Revenu <[email protected]>
> dyld: Library not loaded: /opt/local/lib/libiconv.2.dylib
>  Referenced from: /opt/local/lib/libXpm.4.dylib
>  Reason: Incompatible library version: libXpm.4.dylib requires version 8.0.0 
> or later, but libiconv.2.dylib provides version 7.0.0
> Trace/BPT trap: 5
> 
> Do you have $DYLD_LIBRARY_PATH defined, by any chance?  Or have you possibly 
> tried to replace the MacPorts libiconv with the incompatible system-privided 
> one?
> 
> haral:70286 Z$ otool -DL /usr/lib/libiconv.2.dylib
> /usr/lib/libiconv.2.dylib:
>       /usr/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 
> 7.0.0)
>       /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current 
> version 159.0.0)
> haral:70287 Z$ otool -DL /opt/local/lib/libiconv.2.dylib
> /opt/local/lib/libiconv.2.dylib:
>       /opt/local/lib/libiconv.2.dylib (compatibility version 8.0.0, current 
> version 8.1.0)
>       /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current 
> version 159.1.0)
> 
> In short, sounds like it's looking for the MacPorts libiconv, but finding the 
> system one.
> 
> -- 
> brandon s allbery                                      [email protected]
> wandering unix systems administrator (available)     (412) 475-9364 vm/sms
> 

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