unison fails to build with ocaml 4.03.0

[fjaell]

make -j1 UISTYLE=text THREADS=true NATIVE=true unison unison-fsmonitor
...
ocamlopt -g -I lwt -I ubase -I system -I fsmonitor -I fsmonitor/linux -I fsmonitor/windows -I system/generic -I lwt/generic -c /tmp/unison/src/unison-2.48.3/system.ml
File "/tmp/unison/src/unison-2.48.3/system.ml", line 1:
Error: The implementation /tmp/unison/src/unison-2.48.3/system.ml
does not match the interface system.cmi:
Values do not match:
val symlink : ?to_dir:bool -> string -> string -> unit
is not included in
val symlink : string -> fspath -> unit
Makefile.OCaml:434: recipe for target 'system.cmx' failed
make: *** [system.cmx] Error 2

Same with unison 2.49.543. Both unison version build just fine with ocaml 4.02.x

[0-wiz-0]

I see the same. Is there a patch available?

[jaapb]

The two attached patches solve the problem (at least, it compiles again...)
patch1.txt
patch2.txt

[bcpierce00]

Ouch. The patched version does indeed compile under 4.03 (thanks!), but it does not compile under 4.02! Wonder if there's any way we can have both...

[bcpierce00]

OK, I found a different way to patch it that also compiles under 4.02. Whew. Closing this pull request -- thanks for the help!

[brianthelion]

@bcpierce00 What was the solution for ocaml 4.02? I'm struggling here.

[bcpierce00]

Unison 2.48.4 should compile with 4.02 (and 4.03).

[bcpierce00]

(available on the Unison download page)

[brianthelion]

@bcpierce00 Thanks! But not the Github master?

[bcpierce00]

The github master also compiles under both 4.02 and 4.02, but it's now at version 2.50, so it won't interoperate with 2.48.