Hello

I got this error at link :

make
ocamlc  -a -o frames.cma unix.cma -cclib -lunix str.cma -cclib -lstr
tools.cmo utils.cmo system_units.cmo atomic_symbol.cmo
chemical_element.cmo atom.cmo path.cmo aggregate.cmo chemical_group.cmo
molecule.cmo backbone_link.cmo amino_acids.cmo side_chain.cmo
side_chains.cmo residues.cmo proteins.cmo
ocamlopt  -a -o frames.cmxa unix.cmxa -cclib -lunix str.cmxa -cclib
-lstr tools.cmx utils.cmx system_units.cmx atomic_symbol.cmx
chemical_element.cmx atom.cmx path.cmx aggregate.cmx chemical_group.cmx
molecule.cmx backbone_link.cmx amino_acids.cmx side_chain.cmx
side_chains.cmx residues.cmx proteins.cmx

/usr/local/lib/ocaml/unix.cmxa is not a compilation unit description.    <===


Does anybody knows how to fix it ?
Thanks
François Colonna