gistfile1.sh

#!/bin/bash

set -e
set -x

cd `mktemp -d /tmp/ocamlbuild.XXXXXX`
mkdir a
mkdir b

cat > main.ml <<EOF
let () = print_endline Foo.foo;;
let () = print_endline Bar.bar;;
let () = print_endline Quux.quux;;
EOF

cat > a/foo.ml <<EOF
let foo = "hi";;
EOF

cat > b/bar.ml <<EOF
let bar = "bye";;
EOF

cat > b/quux.ml <<EOF
let quux = "hi";;
EOF

ocamlbuild -verbose 1 -I a -I b main.native

mv b/quux.ml a/
cat >> a/quux.ml <<EOF
let other = 42;;
EOF

ocamlbuild -verbose 1 -I a -I b main.native

mv a/quux.ml b/
cat >> b/quux.ml <<EOF
let another = 42;;
EOF

ocamlbuild -verbose 1 -I a -I b main.native