unikernel/duniverse/ocaml-base64/config/config.ml

@@ -0,0 +1,7 @@
+let parse s = Scanf.sscanf s "%d.%d" (fun major minor -> (major, minor))
+
+let () =
+  let version = parse Sys.ocaml_version in
+  if version >= (4, 7)
+  then print_string "unsafe_stable.ml"
+  else print_string "unsafe_pre407.ml"

unikernel/duniverse/ocaml-base64/config/dune

@@ -0,0 +1,7 @@
+(executable
+ (name config))
+
+(rule
+ (with-stdout-to
+  which-unsafe-file
+  (run ./config.exe)))