Re: [Caml-list] ocamlbuild: problem building -for-pack targets with .p.native extension

[Gabriel Scherer <gabriel.scherer@gmail.com>]

This is a known bug due to the fact that the compiler looks for module
of the exact name "foo.cmx", while ocamlbuild produces "foo.p.cmx".

  http://caml.inria.fr/mantis/view.php?id=4574

I suppose you can workaround this issue by using the usual ".native"
target instead of ".p.native", adding (-tag profile) to the ocamlbuild
invocation line (or "true: profile" in your tags).

On Thu, Jun 20, 2013 at 10:05 PM, Christoph Sticksel
<christoph@sticksel.info> wrote:
> Hi all,
>
> I have an ocamlbuild project where I keep some modules in a package and that
> compiles all fine as .native or .byte. However, once I want to compile it to
> native profiling .p.native, it fails with
>
> | Error: File SExpr/stringSExpr.p.cmx was compiled without access
> |        to the .cmx file for module SExprBase,
> |        which was produced by `ocamlopt -for-pack'.
> |        Please recompile SExpr/stringSExpr.p.cmx with the correct `-I'
> option
> |        so that SExprBase.cmx is found.
>
> although ocamlbuild does add -I SExpr to the compile commands.
>
> The only thing I could find is a six year old question on fa.caml, which
> describes exactly the problem I am facing and includes a minimal example
> that still fails for me, see below.
>
> Can anybody shed some light on that? Is this issue still open?
>
> Thanks,
> Christoph
>
>
> On Monday, November 19, 2007 3:59:52 PM UTC-6, rvanmelle wrote:
>
>     We been happily (mostly) using ocamlbuild for our project, but we've
>     been running into this puzzling problem building .p.native targets
>     when the modules are packed using the -for-pack tag.
>
>     I boiled it down to this relatively simple test case which exhibits
>     the problem.  I was hoping that somebody might have seen this problem
>     and/or have a workaround or fix... or simply point out the silly
>     mistake we are making.  The complete set of files for this simple
>     project are shown below, along with sample usage/output exhibiting the
>     problem:
>
>     ****************
>
>     foo/foo.ml <http://foo.ml>:
>     let _ =
>         let x = Bar.bar () in
>         Printf.printf "%g\n%!" (x +. 3.0)
>
>     foo/bar.ml <http://bar.ml>:
>     let bar () = 5.
>
>     foo/_tags:
>     <foo.p.cmx>: for-pack(Pho)
>     <bar.p.cmx>: for-pack(Pho)
>
>     foo/pho.mlpack:
>     Foo
>     Bar
>
>     $ ocamlbuild foo/foo.native
>     Finished, 7 targets (7 cached) in 00:00:00.
>     $ ./foo.native
>     8
>     $ ocamlbuild foo/foo.p.native
>     + /opt/local/bin/ocamlopt.opt -p foo/bar.p.cmx foo/foo.p.cmx -o foo/
>     foo.p.native
>     File foo/foo.p.cmx was compiled without access to the .cmx file
>     for module Bar, which was produced by `ocamlopt -for-pack'.
>     Please recompile foo/foo.p.cmx with the correct `-I' option so that
>     Bar.cmx
>     is found.
>     Command exited with code 2.
>     Compilation unsuccessful after building 7 targets (6 cached) in
>     00:00:00.
>
>
>     Hope somebody can help
>
>     - Reid
>
>
>
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