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From: Christophe Papazian <christophe.papazian@gmail.com>
To: Ashish Agarwal <agarwal1975@gmail.com>
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Subject: Re: [Caml-list] ocamlfind: When using -syntax, the META variable 'preprocessor' must be set

I got this problem a few days ago, and need a quick fix.
Everything was installed but after an upgrade I got the same kind of  
error.
To avoid the problem, i drop the "-syntax" parameter and replace it  
with "-pp" :

What *should* work for me : ocamlfind ocamlc -package js_of_ocaml - 
syntax camlp4o
What's *really* work for me : ocamlfind ocamlc -package js_of_ocaml - 
pp "camlp4o -I /path/to/js_of_ocaml pa_js.cmo"

Hope this help

   Christophe

Le 9 oct. 11 à 00:46, Ashish Agarwal a écrit :

> I get the error below after reinstalling OCaml with the latest  
> version with GODI. My code has not changed, so I'm wondering if  
> there is a change to ocamlbuild or ocamlfind that is causing this.  
> The issue appears to be that -package camlp4 should be included in  
> the ocamlfind command but it is not.
>
> The section "Does Findlib support camlp4" in the findlib User's  
> Guide discusses the 'preprocessor' variable, but I can't figure out  
> how exactly how to adjust my META file or whether I really need to  
> since it was working before.
>
> ocamlbuild sequme.cma sequme.cmxa sequme.cmxs
> Finished, 0 targets (0 cached) in 00:00:00.
> + ocamlfind ocamldep -package batteries -package biocaml -package  
> netclient -package netstring -package shell -package sqlite3 -syntax  
> camlp4o -modules sequme/bowtie.mli > sequme/bowtie.mli.depends
> ocamlfind: When using -syntax, the META variable 'preprocessor' must  
> be set
> Command exited with code 2.
>
> --- META ---
> requires = "netstring shell netclient batteries biocaml pgocaml"
> version = "0.0"
> archive(byte) = "sequme.cma"
> archive(native) = "sequme.cmxa"
>