[dev] Add include versions for Dune builds.

Fixes #9537

This way, users can do:
```
dune exec coqtop.byte
> Drop.
 # #directory "dev";;
 # #use "include_dune";;
```

1 files changed, 22 insertions, 0 deletions

diff --git a/dev/include_dune b/dev/include_dune
new file mode 100644
index 0000000000..2ef8eb4d04
--- /dev/null
+++ b/dev/include_dune
@@ -0,0 +1,22 @@
+(* File to include to install the pretty-printers in the ocaml toplevel *)
+
+(* Typical usage :
+
+   $ dune exec coqtop.byte # or even better : rlwrap coqtop.byte
+   Coq < Drop.
+   # #directory "dev";;
+   # #use "include";;
+
+   Alternatively, you can avoid typing #use "include" after each Drop
+   by adding the following lines in your $HOME/.ocamlinit :
+
+   #directory "+compiler-libs";;
+   if Filename.basename Sys.argv.(0) = "coqtop.byte"
+   then ignore (Toploop.use_silently Format.std_formatter "dev/include")
+*)
+
+#cd ".";;
+#use "incdir_dune";;
+#use "base_include";;
+#use "inc_ltac_dune";;
+#use "include_printers";;