Compiler flag to disable the "implicit interface" feature.

[vicuna]

Original bug ID: 7493
Reporter: @damiendoligez
Status: confirmed (set by @damiendoligez on 2017-02-24T14:17:53Z)
Resolution: open
Priority: normal
Severity: feature
Version: 4.05.0 +dev/beta1/beta2/beta3/rc1
Category: compiler driver
Tags: junior_job

Bug description

Following the discussion in #217, the core team agreed that we would like a command-line option to make the compiler raise an error when compiling a .ml file if the corresponding .mli is missing.

[Octachron]

A warning would probably be a better option than a compiler flag in this case.

[Anukriti12]

Hi! I'm an Outreachy applicant. I looked up the source code and found parse_intf function of compile_common.ml is responsible for compilation of .mli interface file. I would like to work on this issue. As @Octachron suggested it's better to put a warning then a compiler flag I can put a wrapper which will check mli file path before actually compiling it.

[github-actions]

This issue has been open one year with no activity. Consequently, it is being marked with the "stale" label. What this means is that the issue will be automatically closed in 30 days unless more comments are added or the "stale" label is removed. Comments that provide new information on the issue are especially welcome: is it still reproducible? did it appear in other contexts? how critical is it? etc.

[gasche]

The PR #9407 is in almost-mergeable state; I think we should make a decision there, either finish and merge it, or decide that we don't really want the feature and close the PR and the issue.