Unable to build interpreter (missing files or compiler flags?)

[osa1]

Interpreter README says simply run make to build the interpreter, but make (and make all, make opt etc.) fails with:

$ make
echo >_tags "true: bin_annot"
echo >>_tags "true: debug"
echo >>_tags "<{util,syntax,binary,text,valid,runtime,exec,script,host,main,tests}/*.cmx>: for-pack(Wasm)"
ocamlbuild -lexflags -ml -cflags '-w +a-4-27-42-44-45 -warn-error +a-3' -I util -I syntax -I binary -I text -I valid -I runtime -I exec -I script -I host -I main -I tests -libs bigarray -quiet main.native
+ /home/omer/.opam/default/bin/ocamlc.opt -c -w +a-4-27-42-44-45 -warn-error +a-3 -g -bin-annot -I exec -I main -I util -I script -I valid -I runtime -I tests -I syntax -I binary -I text -I host -o exec/ixx.cmo exec/ixx.ml
File "exec/ixx.ml", line 1:
Error (warning 70 [missing-mli]): Cannot find interface file.
Command exited with code 2.
make: *** [Makefile:70: main.native] Error 10
rm _tags

OCaml version:

$ ocamlc --version
4.13.1

[rossberg]

The Wasm Makefile sets warnings to errors. But OCaml recently added additional warnings, which the code runs into. To fix this, you'll have to tweak the Makefile. I believe the following change to line 22 should do the trick:

FLAGS =         -lexflags -ml -cflags '-w +a-4-27-42-44-45-70 -warn-error +a-3'

(Please let me know if this works. I don't have OCaml 4.13 installed, so cannot test it right now.)

[osa1]

It works, thanks. It seems like it's safe to make this change in the repo as with the flag I can build the interpreter with OCaml 4.08.0 too.

[rossberg]

Closed via #1481.