CODEWITHSUNDEEP
ocamlocaml-dune
Jack Murrow
Jack Murrow

Reputation: 426

Why is dune using ocamlc when I asked to use ocamlopt?

$ dune build ./src/main.exe --profile=release
      ocamlc src/.main.eobjs/byte/ast.{cmi,cmo,cmt} (exit 2)
(cd _build/default && /usr/bin/ocamlc.opt -w -40 -O3 -g -bin-annot -I src/.main.eobjs/byte -I /home/jackprograms/.opam/default/lib/cairo2 -I /home/jackprograms/.opam/default/lib/lablgtk3 -I /usr/lib/ocaml/threads -no-alias-deps -o src/.main.eobjs/byte/ast.cmo -c -impl src/ast.ml)
/usr/bin/ocamlc.opt: unknown option '-O3'.

I ran this, and dune is using ocamlc bytecode... I am using exe which means native, as I saw on the dune documentation. Why is it running ocamlc when it should be running ocamlopt?

(executable
 (name main)
 (libraries lablgtk3)
 (modes exe))

(ocamllex
 (modules lexer))

(ocamlyacc
 (modules parser))

(env
 (dev
  (flags (:standard -w +42)))
 (release
  (flags (:standard -O3))))

^ In src directory

Upvotes: 0

Views: 577

Answers (1)

Jack Murrow
Jack Murrow

Reputation: 426

It will still use ocamlc to compile .cmi files.

Instead of using flags (e.g. (flags (:standard -O3))), use ocamlopt_flags.

(executable
 (name main)
 (libraries lablgtk3)
 (modes exe))

(ocamllex
 (modules lexer))

(ocamlyacc
 (modules parser))

(env
 (dev
  (flags (:standard -w +42)))
 (release
  (ocamlopt_flags (:standard -O3))))

Upvotes: 1

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