Merge pull request ocaml#705 from shindere/fix-ocamlnat-build-on-windows

Update Makefile.nt so that ocamlnat compiles for non-Cygwin Windows ports.

Makefile.nt

@@ -359,9 +359,16 @@ partialclean::
 
 # The native toplevel
 
-ocamlnat: ocamlopt otherlibs/dynlink/dynlink.cmxa $(NATTOPOBJS:.cmo=.cmx)
-	$(CAMLOPT) $(LINKFLAGS) otherlibs/dynlink/dynlink.cmxa -o ocamlnat \
-	           $(NATTOPOBJS:.cmo=.cmx) -linkall
+compilerlibs/ocamlopttoplevel.cmxa: $(OPTTOPLEVEL:.cmo=.cmx)
+	$(CAMLOPT) -a -o $@ $(OPTTOPLEVEL:.cmo=.cmx)
+partialclean::
+	rm -f compilerlibs/ocamlopttoplevel.cmxa
+
+ocamlnat: compilerlibs/ocamlcommon.cmxa compilerlibs/ocamloptcomp.cmxa \
+    compilerlibs/ocamlbytecomp.cmxa \
+    compilerlibs/ocamlopttoplevel.cmxa \
+    $(OPTTOPLEVELSTART:.cmo=.cmx)
+	$(CAMLOPT) $(LINKFLAGS) -linkall -o $@ $^
 
 toplevel/opttoploop.cmx: otherlibs/dynlink/dynlink.cmxa