]> Never mind. Problem was with /usr/lib/ocaml/dynlink/META which was missing native library spec. (My actual project that didn't compile used native mode) Fix: --- /usr/lib/ocaml/dynlink/META.orig 2009-02-26 05:23:21.000000000 -0500 +++ /usr/lib/ocaml/dynlink/META 2009-10-14 15:02:56.253171783 -0400 @@ -5,4 +5,4 @@ directory = "^" browse_interfaces = " Btype Bytesections Clflags Config Consistbl Dll Dynlink Ident Meta Misc Opcodes Path Predef Runtimedef Symtable Tbl Types " archive(byte) = "dynlink.cma" - +archive(native) = "dynlink.cmxa"