Re: using opam ?

On Wed, Nov 6, 2013 at 1:06 PM, Vu Ngoc San <[email protected]> wrote:

  I see, thanks. I use OcamlMakefile, it would be great if I could still
> use the PACK option.
>

I don't use OcamlMakefile, so I might be wrong, but PACK sounds like it has
to do with packing multiple modules (in your code) into one module. This is
unrelated to your original question. See the -pack option in the User
Manual.


is there a way to tell opam to use the standard location /usr/lib/ocaml
> or maybe this is not recommended ?
>

This is not recommended. OPAM keeps everything under a single directory
that is fully under its control. This is quite nice. You can delete this
one directory to start fresh if needed.




>
> Le 06/11/2013 18:49, Ashish Agarwal a écrit :
>
>
> OPAM installs the package, but you still have to tell your program to use
> it. In the interactive toplevel you have to do:
>
>  # #require "foo"
>
>  For compiling a file, it depends on what build toolchain you are using.
> At the lowest level, you are using directly the compilers ocamlc or
> ocamlopt. See the User Manual for the options you have to use.
> http://caml.inria.fr/pub/docs/manual-ocaml/
>  - see Chapters 8 and 11.
>
>  You may however want to use Oasis, which let's you specify your build
> more easily. In your _oasis file, you have to specify the packages in the
> BuildDepends field. See the Oasis documentation:
>  http://oasis.forge.ocamlcore.org/documentation.html
>
>
>
>
>
> On Wed, Nov 6, 2013 at 11:44 AM, Vu Ngoc San <[email protected]>wrote:
>
>>
>>
>> Dear list
>>
>> I just went through the OPAM web page.
>> http://opam.ocaml.org/
>> and I have a very stupid question.
>>
>> It says it is a package manager for ocaml.
>> I assume it means that it can do the following:
>>
>> I want to install a library foo -->
>> 1) I type opam install foo
>> 2) and then I can use foo in my ocaml programs ?
>>
>> The stupid thing is that I don't know how to do 2). The packages seem to
>> be installed in
>> $HOME/.opam/system/lib, whereas I have a preexisting ocaml install
>> (ubuntu).
>> Do it mean that I need to include this DIR in my Makefile ?
>> Of course I can do it, but I see no reference to this in the OPAM FAQ,
>> and it seems not very user friendly to me, so I must be missing something.
>> I would expect a package manager that gives me immediately usable
>> libraries like gem for ruby, but maybe this is not the goal ?
>>
>> San
>>
>
>
>  
>