ocaml.warning does not work with ocaml.ppwarning

[vicuna]

Original bug ID: 7361
Reporter: @bobzhang
Assigned to: @alainfrisch
Status: resolved (set by @alainfrisch on 2017-10-10T09:33:23Z)
Resolution: fixed
Priority: normal
Severity: minor
Target version: 4.06.0 +dev/beta1/beta2/rc1
Fixed in version: 4.06.0 +dev/beta1/beta2/rc1
Category: compiler driver
Related to: #6714
Monitored by: @gasche

Bug description

[@@@ocaml.warning "-22"]

let a = 3
[@@ocaml.ppwarning "hey"]

ocamlc.opt -c a.ml // print warning which should not
ocamlc.opt -w -22 -c a.ml // good

[vicuna]

Comment author: @bobzhang

relevant issue #6714, I feel that it is very hard to get a solid implementation for @@@ocaml.warning, @@ocaml.waring and @ocaml.warning.

Maybe the most simple and solid implementation is just allow @@@ocaml.warning in the beginning of a file

[vicuna]

Comment author: @alainfrisch

Will be fixed by : #1248