Disable "make all warnings errors"

Learning
9

I read this there :

(inline_tests <state>), where <state> is either enabled, disabled, or ignored. This field has been available since Dune 1.11. It controls the variable’s value %{inline_tests}, which is read by the inline test framework. The default value is disabled for the release profile and enabled otherwise.

I haven’t checked recently if this has changed (and then the doc must be out of date), but this was still working this way last year.

EDIT: see also this post and subsequent messages that, for some, confirm this issue.