Yann, if you use the Dune build tool it automatically prefixes your
package's modules with the package name, e.g. if you have `mypackage/src/
format.ml` in your source, Dune will make sure it gets compiled to
`mypackage__format.cmi`.

Regards,

Yawar

On Mon, Apr 23, 2018 at 10:14 AM, Yann Hamdaoui <yann.hamdaoui@gmail.com>
wrote:

> I see. I'm tempted to wait for 4.07 but keeping a module named Format
> would still break compatibility for lower versions, so I guess I have to
> come up with a different name.
> Thank you for your help, Nicolás.
>
> Y.H
>
> On 22/04/2018 17:29, Nicolás Ojeda Bär wrote:
> > Hello Yann,
> >
> > Indeed, you cannot link two different modules of the same name in the
> > same program, where "same name" essentially means that their .cmi
> > files are named similarly.
> > The good news is that the upcoming 4.07 release fixes this
> > long-standing issue by using long compilation unit names for stdlib
> > modules which are unlikely to conflict with anything else.
> > (e.g. the .cmi of the stdlib Format module is named stdlib__format.cmi
> in 4.07).
> >
> > Best wishes,
> > Nicolás
> >
> > On Sun, Apr 22, 2018 at 4:53 PM, Yann Hamdaoui <yann.hamdaoui@gmail.com>
> wrote:
> >> Dear list,
> >>
> >> I ran into a problem today while compiling a library of mine. I got the
> >> following error :
> >>
> >> "Error: The files [...]/.opam/4.06.0/lib/re/re.cmi and src/format.cmi
> >> make inconsistent assumptions over interface Format".
> >>
> >> After a quick search it should be solved by cleaning everything and make
> >> a fresh build. In my case it didn't, and I suspect this is because I
> >> declared a module named Format in my lib which clashes with the
> >> Pervasive.Format that seems to be used by the re library (which is a
> >> dependence). Does it mean that I can't use any XXX as a module name if
> >> it already exists in Pervasives and is used by some library I depend on
> ?
> >>
> >>
> >> Y.H
> >>
> >>
> >> --
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>
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