[Omake] Re: Getting similar errors to previous posts

[Jason Hickey]

On Aug 14, 2007, at 10:56 AM, Todd Gardner wrote:

> Jason Hickey wrote:
>> Add the following line to your OMakefile.
>>    OCAML_OTHER_LIBS[] += graphics
>
> I have this specified for my local build, but I thought by  
> specifying the use ocamldep, the build system would automatically  
> pick up on the dependencies within the standard library. My attempt  
> here is more to get a working prototype for a larger, more scalable  
> build system, so I was trying to get away from having to enter each  
> of included libraries names into the OMakefiles for each project.  
> Is this possible?

ocamldep is really only used for the .cmi and .cmx dependencies.   
Your program has "open Graphics", so ocamldep+omake figure out that  
this means some specific <pathname>/graphics.cmi file.  If <pathname>/ 
graphics.cmi changes, your program will be recompiled.

Unfortunately, there isn't a uniform convention about how libraries,  
like graphics.cma, are named.  It could have been named graphicx.cma,  
or something else, so ocamldep+omake ignores this part.  In general,  
this means you have to specify libraries by hand.  [However, I really  
like the idea of some kind of semi-automated approach.  Mybe in a  
future release...]

In any case, libraries are inherited down the build tree.  So if you  
add "OCAML_OTHER_LIBS[] += graphics" in your toplevel OMakefile, all  
programs will be linked with graphics.cma.

> I agree it is most likely running two versions, however:
>
> C:\ocamlmgw\bin>ocamlfind ocamldep -version
> ocamldep, version 3.10.1+dev0 (2007-05-21)
>
> C:\ocamlmgw\bin>ocamldep -version
> ocamldep, version 3.10.1+dev0 (2007-05-21)

This is -very- strange.

Here are some things you could do just from omake.

    2. OCAMLDEP_MODULES_ENABLED = false
       But I don't like this much, because -modules is much better.
    3. OCAMLDEP_MODULES_USE_OCAMLFIND = false
       Just turn off using ocamlfind, but this is probably a hassle.
    4. Use a custom scanner, by redefining the OCamlScanner function.
       You can define the command to be whatever you want.  But I
       don't know what that would be...

But if you can get findlib to work properly that is probably a lot  
better.

    1. Try to track down the real problem.

          # (Your config will be different)
          % ocamlfind printconf
          Effective configuration:
          Configuration file:
              /usr/local/godi/etc/findlib.conf
          [snipped]

          % cat /usr/local/godi/etc/findlib.conf
          destdir="/usr/local/godi/lib/ocaml/site-lib"
          path="/usr/local/godi/lib/ocaml/pkg-lib:/usr/local/godi/lib/ 
ocaml/site-lib"
          ocamlc="ocamlc.opt"
          ocamlopt="ocamlopt.opt"
          ocamldep="ocamldep.opt"

Maybe the path in your findlib.conf is incorrect.  You should  
probably check the path by hand and make sure ocamlfind is really  
using the ocamldep you want.

Jason

--
Jason Hickey                  http://www.cs.caltech.edu/~jyh
Caltech Computer Science      Tel: 626-395-6568 FAX: 626-792-4257