[Caml-list] cppo and camlp4 ? which way to go ?

[Caml-list] cppo and camlp4 ? which way to go ?

[Marc Weber]

It looks like ocaml supports only one -pp option?
Now I want both: first cppo, then camlp4?

Which way to go?
way 1) find a way to make ocaml accept multiple -pp

way 2) KISS: -pp 'cppo | camlp4', unlikely to work, because -pp adds the
       input file as last argument?

       Well - could be using -pp 'sh -c "cppo $1 | camlp4 $1 ..." '

       that's linux, only, starting quoting hell

way 3)
  make cppo accept additional options, and make it call camlp4 and pass
  its data to it
  3.1: using a file: batteries includes with_temp_file, but would add
        new dependencies
  3.2: pipe through command, which cross platform implementation does
        exist?


way 4) rewrite my tracing code to use new -ppx (would take too long ?)

Have I missed a simple solution ?

I appologize if I've missed the obvious.

Marc Weber

[Caml-list] Re: cppo and camlp4 ? which way to go ?

[Hongbo Zhang]

Hi,
    I think an easy way is to write a wrapper(in python, for example) to 
wrap both cppo and camlp4.
    btw, camlp4 does have optcomp which has similar functionality as cppo.
On 7/9/13 10:03 PM, Marc Weber wrote:
> It looks like ocaml supports only one -pp option?
> Now I want both: first cppo, then camlp4?
>
> Which way to go?
> way 1) find a way to make ocaml accept multiple -pp
>
> way 2) KISS: -pp 'cppo | camlp4', unlikely to work, because -pp adds the
>         input file as last argument?
>
>         Well - could be using -pp 'sh -c "cppo $1 | camlp4 $1 ..." '
>
>         that's linux, only, starting quoting hell
>
> way 3)
>    make cppo accept additional options, and make it call camlp4 and pass
>    its data to it
>    3.1: using a file: batteries includes with_temp_file, but would add
>          new dependencies
>    3.2: pipe through command, which cross platform implementation does
>          exist?
>
>
> way 4) rewrite my tracing code to use new -ppx (would take too long ?)
>
> Have I missed a simple solution ?
>
> I appologize if I've missed the obvious.
>
> Marc Weber
>