Checking for caml version from C

Checking for caml version from C

[rixed]

Hello !

I'm using ocaml 3.11 and 3.12 and I'm writting some C code
that use caml_enter/leave_blocking_section. I'd like to know if
there is a standard way to check for Ocaml version with the C preprocessor
in order to switch to caml_release/acquire_runtime_system if version is
>= 3.12 ?

I grepped for VERSION in all the caml/*.h files without success.
How am I supposed to do ?

Re: [Caml-list] Checking for caml version from C

[Kaustuv Chaudhuri]

On Wed, Sep 15, 2010 at 9:29 PM,  <rixed@happyleptic.org> wrote:
> I'd like to know if there is a standard way to check for
> Ocaml version with the C preprocessor

Not sure about standard ways, but here's one ugly way:

   % cat ugly.c
   #if OCAML_MAJOR == 3 && OCAML_MINOR == 12
     Hello 3.12 world
   #else
     Hello non-3.12 world
   #endif

   % ocamlc -version
   3.12.1+dev4 (2010-09-03)

   % ocamlc \
       -ccopt -DOCAML_MAJOR=`ocamlc -version | cut -d'.' -f1` \
       -ccopt -DOCAML_MINOR=`ocamlc -version | cut -d'.' -f2` \
       -ccopt -E \
       ugly.c
   # 1 "ugly.c"
   # 1 "<built-in>"
   # 1 "<command-line>"
   # 1 "ugly.c"

     Hello 3.12 world


(Drop the -ccopt -E option when you use it, obviously.)

-- Kaustuv