How I can generate a working executable with the tools provided with Llvm/Clang ( version 3.3 (trunk 168461) ) ?
I have compiled an object with clang++ -c [...
There are no llvm linker at this time (yet). And no, llvm-link is not a replacement for LLVM ld. So, you'd need to use ar / ranlib / ld from your binutils for now.
If you want to link LLVM bitcode files, you should have a look at the LLVM Gold Plugin : http://llvm.org/docs/GoldPlugin.html