Correct linking of Unix library in configure (#1470)

* Correct linking of Unix library in configure

* replicates @dra27 change to the configure-omake file

Co-authored-by: ivg <[email protected]>

Author: dra27

configure

@@ -54,6 +54,6 @@ ocaml tools/cat.ml '"\n# $name\n"' -- $TAGS _tags.in _tags
 ocaml tools/cat.ml '"\n#1 \"$name\"\n"' -- $PLUGINS myocamlbuild.ml.in myocamlbuild.ml
 ocaml tools/cat.ml '"\n#1 \"$name\"\n"' -- setup.ml.pre.in $SETUPS setup.ml.in setup.ml
 oasis $QUIET setup
-ocamlfind ocamlopt unix.cmxa setup.ml -o setup.exe
+ocamlfind ocamlopt -package unix -linkpkg setup.ml -o setup.exe
 rm setup.cmx setup.cmi setup.o
 ./setup.exe $QUIET -configure "$@"

configure-omake

@@ -44,7 +44,7 @@ done
 # call setup twice so that it can capture the AB deps
 for pass in `seq 2`; do
     oasis setup
-    ocamlfind ocamlopt unix.cmxa setup.ml -o setup.exe
+    ocamlfind ocamlopt -package unix -linkpkg setup.ml -o setup.exe
     rm setup.cmx setup.cmi setup.o
     ./setup.exe -configure --prefix $(opam config var prefix) "$@"
 done