Hey,

Ok, now the next step would be the following. Carefully check that all
> modules, that you're using in libraries are included in `Modules` or
> `InternalModules`. It is the case
> that sometimes when you forgot to include a module, oasis (actually
> `ocamlbuild`), may produce a strange, and on a first glance, irrelevant
> error message.
>

I checked and sadly the modules I'm trying to access are all in `Modules`.
Perhaps interestingly, it can still clearly detect statically if the
function exists or not because if I try to use a function that doesn't
exist it instead gives me this error (which is what I would normally
expect):

File "ppx/skins.ml", line 39, characters 8-37:
Error: Unbound value Forest_parser_helper.bad_func
Command exited with code 2.


> If it doesn't help then the `_build/_log` file might help us to debug the
> issue.
>

Attached tarball. Too big to send via list otherwise. Thanks so much for
helping with this again. I'm at a total loss.

On Thu, Oct 27, 2016 at 10:59 AM, Jonathan DiLorenzo <
> dilorenzo@cs.cornell.edu> wrote:
>
>> Hey Ivan,
>>
>> Thanks for your response.
>>
>> The first one is that you didn't run `oasis setup` after you made the
>>> changes, so I would suggest cleaning current state
>>> and starting from scratch. (I usually just do `git clean -idx` just to
>>> be sure that I got rid of any generated files, like setup.data, et alas,
>>> but be careful,
>>> don't delete something that you need).
>>>
>>
>> I tried cleaning up all the generated files. Same error unfortunately
>>
>>
>>> Another idea is that you're using oasis 0.4.7 with ocaml-4.03.0+flambda,
>>> they are currently incompatible, and can produce weird bugs. If that so,
>>> then consider switching
>>> either a compiler or oasis to different versions.
>>>
>>
>> I am using oasis 0.4.7 and ocaml-4.03.0, but I don't appear to be using
>> flambda. I tried passing in -config and it said that flambda was false at
>> least, but I admit, I'm not especially familiar with it, so if there's some
>> other way I should be checking for this please let me know. Hopefully,
>> they're compatible sans flambda?
>>
>>
>> On Thu, Oct 27, 2016 at 1:01 AM, Jonathan DiLorenzo <
>>> dilorenzo@cs.cornell.edu> wrote:
>>>
>>>> Hey all,
>>>>
>>>> I'm trying to build my system using Oasis and OCamlbuild. I have 3
>>>> different libraries and for some reason I seem to only be able to refer
>>>> from one to the other in seemingly random files. For example, I want my
>>>> 'ppx' library to be able to use functions from my 'parser' library. One
>>>> file (ppx_forest.ml) can use functions from it, while another in the
>>>> same library (skins.ml) cannot, giving me this error:
>>>>
>>>> File "_none_", line 1:
>>>> Error: No implementations provided for the following modules:
>>>>          Forest_parser_helper referenced from ppx/ppx.cmxa(Skins)
>>>> Command exited with code 2.
>>>>
>>>> They can all refer to types I've defined therein though.
>>>>
>>>> I'm not fantastic at Oasis so maybe I'm just missing something basic?
>>>> Any ideas? Any more information I can gather to give more context otherwise?
>>>>
>>>> Thanks in advance,
>>>> Jonathan
>>>>
>>>> Excerpt of my Oasis file that may possibly be relevant:
>>>>
>>>> Library forest
>>>>   Path:          lib
>>>>   BuildTools:    ocamlbuild
>>>>   BuildDepends:   pads, str, re, re.glob, core, threads, ppx_let
>>>>   CompiledObject: best
>>>>   Modules:       Forest, PadsInterface
>>>>
>>>> Library parser
>>>>   Path:           parsing
>>>>   BuildTools:     ocamlbuild, menhir, ocamllex
>>>>   Findlibparent:  forest
>>>>   Findlibname:    parser
>>>>   BuildDepends:   forest, ppx_deriving.show, compiler-libs.common
>>>>   CompiledObject: best
>>>>   Modules:  Forest_parser_helper
>>>>   InternalModules: Forest_lexer, Forest_parser, Forest_types
>>>>
>>>> Library ppx
>>>>   Path:           ppx
>>>>   BuildTools:     ocamlbuild
>>>>   Findlibparent:  forest
>>>>   Findlibname:    ppx
>>>>   BuildDepends:   re, re.str, forest.parser, forest, ppx_tools.metaquot
>>>>   CompiledObject: best
>>>>   Modules:        Ppx_forest
>>>>   InternalModules: Ppx_forest_lib, Utility, Skins
>>>>   XMETAEnable:    true
>>>>   XMETARequires:   str re core threads ppx_tools.metaquot
>>>>   XMETAExtraLines:  ppx = "ppx_forest"
>>>>
>>>> Executable ppx_forest
>>>>   Path:           ppx
>>>>   MainIs:         ppx_forest.ml
>>>>   BuildDepends:   forest, forest.parser, forest.ppx, pads.ppx,
>>>> ppx_tools.metaquot
>>>>   CompiledObject: best
>>>>
>>>>
>>>
>>
>