Am Donnerstag, den 12.06.2008, 09:44 -0700 schrieb Luca de Alfaro:
> I am trying to use sexplib to serialize some data structures, as many
> of you advised, and I am somewhat stuck trying to compile. 
> This is what I get:
> 
> ocamlfind ocamlc -package
> unix,str,vec,mapmin,hashtbl_bounded,fileinfo,intvmap,extlib,mysql,sexplib -I ../../batch/analysis -I +camlp4 -pp camlp4orf -g -c online_db.ml
> File "online_db.ml", line 44, characters 22-26:
> Parse error: [semi] expected after [str_item] (in [implem])
> Preprocessor error

I would try

ocamlfind ocamlc -package sexplib,... -syntax camlp4o -I ... -c
online_db.ml

ocamlfind includes some mechanics to drive camlp4, and I am pretty sure
sexplib configures that.

Gerd

> 
> where my line 44 is simply: 
> 
> type foo_t = int list with sexp
> 
> I have the impression that the problem is in how I compile.
> Specifically, if I do not use the "-pp camlp4orf" part, I get a
> "syntax error", as the file is not getting preprocessed. 
> If I use the above -pp line, I get the error I reported.  I am not
> sure what is the proper way to preprocess the file, and unfortunately,
> sexplib does not explain how to compile code against it. 
> I am sure this is obvious for everybody, but it is the first time I
> use camlp4, so some help would be appreciated. 
> 
> All the best, 
> 
> Luca
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