xemacs mac os x Lion 10.7.2

[Benoît Revenu]

Dear all,
after a first post on the Mac Ports site concerning  the installation of xemacs on mac os x Lion, I tried :
sudo port clean xemacs
sudo port install xemacs configure.compiler=llvm-gcc-4.2
but then, I have this problem :
~home->xemacs
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

I tried to clean the mac ports installed programs and libs, and reinstall libiconv, libxpm with the same option configure.compiler=llvm-gcc-4.2
but it didn't change anything, I still have 
::~>xemacs
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


could you please explain me the good way to install xemacs ?
Thanks a lot
Benoit