Tentative multistage yaml config file.

Remove spurious code with 'Printexc.backtrace'

.gitlab-ci.yml

-default:
-  image: docker-cduce:latest
-  before_script:
-    - echo "$USER"
-    - eval `opam config env`
-    - echo "$PATH"
-    - opam update -y
-    - opam upgrade -y
-
-build-test:
+stages:
+    - compile
+    - test
+    - package
+
+.compile_template: &compile_template
+  script:
+    - dune build @binary
+
+.test_template: &test_template
+  script:
+    - dune build @runtest
+
+.package_template: &package_template
   script:
-    - sh tools/init_opam_switch.sh
-    - dune build -j 4 
+    - opam pin -y cduce-types .
+    - opam pin -y cduce .
+compile:4.07.1:
+  image:ocaml-cduce:compile
+  <<: *4.07.1_template
+
+
+compile:4.08.1:
+  image:ocaml-cduce:compile
+  <<: *4.08.1_template
+
+
+compile:4.09.1:
+  image:ocaml-cduce:compile
+  <<: *4.09.1_template
+
+
+compile:4.10.2:
+  image:ocaml-cduce:compile
+  <<: *4.10.2_template
+
+
+compile:4.11.2:
+  image:ocaml-cduce:compile
+  <<: *4.11.2_template
+
+
+compile:4.12.0:
+  image:ocaml-cduce:compile
+  <<: *4.12.0_template
+
+
+test:4.07.1:
+  image:ocaml-cduce:test
+  <<: *4.07.1_template
+
+
+test:4.08.1:
+  image:ocaml-cduce:test
+  <<: *4.08.1_template
+
+
+test:4.09.1:
+  image:ocaml-cduce:test
+  <<: *4.09.1_template
+
+
+test:4.10.2:
+  image:ocaml-cduce:test
+  <<: *4.10.2_template
+
+
+test:4.11.2:
+  image:ocaml-cduce:test
+  <<: *4.11.2_template
+
+
+test:4.12.0:
+  image:ocaml-cduce:test
+  <<: *4.12.0_template
+
+
+package:4.07.1:
+  image:ocaml-cduce:package
+  <<: *4.07.1_template
+
+
+package:4.08.1:
+  image:ocaml-cduce:package
+  <<: *4.08.1_template
+
+
+package:4.09.1:
+  image:ocaml-cduce:package
+  <<: *4.09.1_template
+
+
+package:4.10.2:
+  image:ocaml-cduce:package
+  <<: *4.10.2_template
+
+
+package:4.11.2:
+  image:ocaml-cduce:package
+  <<: *4.11.2_template
+
+
+package:4.12.0:
+  image:ocaml-cduce:package
+  <<: *4.12.0_template
 

dune

@@ -39,3 +39,8 @@
  (target cduce_lib_js.ml)
  (action
   (write-file %{target} "include Cduce_core\ninclude Cduce_jsoo_backend")))
+
+(rule
+ (alias binary)
+ (deps driver/cduce.exe driver/cduce_js_top.bc.js)
+ (action (echo "")))
\ No newline at end of file

ocamliface/mlcompat_411_12.ml

 (* Compatibilty for OCaml 4.11 & 4.12 *)
 open Cduce_core
-let () =Printexc.record_backtrace true
+
 let longident_parse s =
     let open Ocaml_common in
     let rec loop first s =