Port to OCaml 4.12

Author: AltGr

Dockerfile

@@ -1,4 +1,4 @@
-FROM ocaml/opam:alpine-3.13-ocaml-4.12 as compilation
+FROM ocaml/opam2:alpine as compilation
 LABEL Description="learn-ocaml building" Vendor="OCamlPro"
 
 WORKDIR /home/opam/learn-ocaml

learn-ocaml.opam.locked

@@ -74,6 +74,7 @@ depends: [
   "mmap" {= "1.1.0"}
   "num" {= "1.4"}
   "ocaml" {= "4.12.0"}
+  "ocaml-base-compiler" {= "4.12.0"}
   "ocaml-compiler-libs" {= "v0.12.3"}
   "ocaml-config" {= "2"}
   "ocaml-migrate-parsetree" {= "1.8.0"}

src/main/dune

@@ -9,9 +9,9 @@
 ;; (package learn-ocaml) ;; missing support in dune, manually installed below
 ;; (public_name learn-ocaml)
  (name learnocaml_main)
- (modes byte_complete)
- (ocamlc_flags -custom)
- (flags :standard -linkall -verbose (:include linking_main.sexp))
+ (modes byte)
+ (flags (:standard -linkall
+         (:include linking_main.sexp)))
  (modules Learnocaml_main)
  (libraries cmdliner
             sha
@@ -31,9 +31,9 @@
 ;; (package learn-ocaml-client) ;; missing support in dune, manually installed below
 ;; (public_name learn-ocaml-client)
  (name learnocaml_client)
- (modes byte_complete)
- (ocamlc_flags -custom)
- (flags :standard -linkall (:include linking_client.sexp))
+ (modes byte)
+ (flags (:standard -linkall
+         (:include linking_client.sexp)))
  (modules Learnocaml_client)
  (libraries cmdliner
  	    sha