I'm porting my application from OCaml 4.02.3 to 4.03.0.
Say you have the following in lexer.ml:
type t = T [@@deriving sexp]
let () =
sexp_of_t |> ignore;
print_endline "hai"
I'm trying to run it as following:
ocamlbuild -use-ocamlfind -pkg ppx_sexp_conv -cflags '-w @a-4-31' lexer.byte --
But I'm getting the following error:
Warning 31: files lexer.cmo and /Users/vladimir/.opam/4.03.0+flambda/lib/ocaml/compiler-libs/ocamlcommon.cma(Lexer) both define a module named Lexer
File "_none_", line 1:
Error: Some fatal warnings were triggered (1 occurrences)
I understand that compiler-libs has a module called Lexer as well and it clashes with my lexer, however:
I'm not trying to link compiler-libs. I understand that it is used by ppx_sexp_conv, but it's a preprocessor, it should not need to link compiler-libs into my app.
Warning 31 is just a warning, and I'm explicitly trying to dismiss it (-w @a-4-31) as a workaround, but that does not work. It used to work in 4.02.3.