[Caml-list] library dynamic loading ?

[Caml-list] library dynamic loading ?

[SooHyoung Oh]

Hi!

Is it possible to load library dynamically?

Here are my trials; Did I miss something or is it impossible to load library
dynamically?

(1) First,  I made toplevel system with unix library
    $ ocamlmktop -o unixtop unix.cma

(2) GOOD!!!: It's OK to execute a script
    $ cat fread

    open Unix;;

    let buffer = String.create 100 in

    let fd = openfile "demo.txt" [O_RDONLY] 0 in

    let n = read fd buffer 0 100 in

    let err = write stdout buffer 0 n in

    close fd;;

    $ unixtop fread

    Hello

(3) Fail 1: dynamic load of unix library

    $ ocaml unix.cma fread

    File "/usr/lib/ocaml/threads/unix.cma", line 1, characters 12-13:

    Illegal character (\000)

(4) Fail 2: dynamic load of library

    $ cat fread2

    #load “unix.cma”;;

    ... (same as fread)

    $ ocaml fread2

    The external function `unix_read' is not available



--- SooHyoung Oh

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Re: [Caml-list] library dynamic loading ?

[Sven]

On Wed, Sep 12, 2001 at 01:53:15PM +0900, SooHyoung Oh wrote:
> 
> Hi!
> 
> Is it possible to load library dynamically?
> 
> Here are my trials; Did I miss something or is it impossible to load library
> dynamically?

It is already implemented in ocaml 3.03, but not currently in 3.02. In the
meantime, you have to build a custom toplevel, as explained in the docs.

Friendly,

Sven Luther
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