From: Pietro Abate <Pietro.Abate@pps.jussieu.fr>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Conditional compilation
Date: Fri, 21 Aug 2009 11:39:45 +0200 [thread overview]
Message-ID: <20090821093945.GA27563@uranium.pps.jussieu.fr> (raw)
In-Reply-To: <1250562412.6289.8.camel@homesick>
On Mon, Aug 17, 2009 at 11:26:52PM -0300, Andre Nathan wrote:
> On Mon, 2009-08-17 at 22:00 -0400, Edgar Friendly wrote:
> > Is there a better way to do this? The path I'm following is looking
> > very byzantine compared to C's [-DFOO] + [#ifdef FOO].
> In ospec I use
In my projects I sometimes used directly cpp (Lazy me!). Today I
realized that is not such a good idea cpp interprets c++ comments - like
"\\" - and removes them from your code. For example is you compile the
following empty program with
> ocamlbuild -pp "cpp" test.native
--- test.ml ---
(* http://localhost.org *)
---------------
you will get an error like :
File "test.ml", line 2, characters 5-7:
Error: Comment not terminated
Command exited with code 2.
that is the result of the preprocessing step :
> cpp test.ml
# 1 "test.ml"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "test.ml"
(* http:
------------------
Just to say that "-pp camlp4o Camlp4MacroParser.cmo" is a safer choice
... And maybe I was the only fool using cpp with ocaml ...
>
> -pp "camlp4o Camlp4MacroParser.cmo -D FOO"
>
> which can then be tested in the code with
>
> IFDEF FOO THEN
> ...
> END
>
>
> HTH,
> Andre
>
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next prev parent reply other threads:[~2009-08-21 9:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-18 2:00 Edgar Friendly
2009-08-18 2:26 ` [Caml-list] " Andre Nathan
2009-08-18 2:37 ` Edgar Friendly
2009-08-18 7:00 ` Olivier Andrieu
2009-08-21 9:39 ` Pietro Abate [this message]
2009-08-18 10:20 ` Richard Jones
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