Dynamic loading on Mac OS X

Dynamic loading on Mac OS X

[Harrison, John R]

This discussion of dynamic loading in 3.11 reminded me of a more basic
question I meant to ask, but never did. On certain platforms, e.g. all
Linuxes I've ever used, the following works in a plain OCaml toplevel:

  #load "nums.cma";;

On other platforms, notably Cygwin, it doesn't. (At least, for OCaml
3.10 on my version of Cygwin, which is not very old.)

  # #load "nums.cma";;
  Cannot load required shared library dllnums.
  Reason: dllnums.so: dynamic loading not supported on this platform.

I was sure that Mac OS X was among the platforms where this *doesn't*
work, based on experiments a year or two ago. However I recently found
that apparently it *does* after all work on my Mac. Since the original
experiments I've upgraded the Mac to Leopard, and maybe I've even
changed my OCaml version, though I don't remember for sure. Am I just
plain wrong, or has this really only started to work recently?

John.

Re: [Caml-list] Dynamic loading on Mac OS X

[Daniel Bünzli]

Le 15 oct. 08 à 22:14, Harrison, John R a écrit :

> Am I just plain wrong, or has this really only started to work  
> recently?

Dynamic linking of C libraries worked for me on macosx (at least ppc)  
a long time ago. According to the release notes this happened in 3.07,  
i.e. in 2003.

Best,

Daniel

Re: [Caml-list] Dynamic loading on Mac OS X

[Ashish Agarwal]

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See this post on beginner's list:
http://tech.groups.yahoo.com/group/ocaml_beginners/message/6905


On Wed, Oct 15, 2008 at 4:14 PM, Harrison, John R <john.r.harrison@intel.com
> wrote:

> This discussion of dynamic loading in 3.11 reminded me of a more basic
> question I meant to ask, but never did. On certain platforms, e.g. all
> Linuxes I've ever used, the following works in a plain OCaml toplevel:
>
>  #load "nums.cma";;
>
> On other platforms, notably Cygwin, it doesn't. (At least, for OCaml
> 3.10 on my version of Cygwin, which is not very old.)
>
>  # #load "nums.cma";;
>  Cannot load required shared library dllnums.
>  Reason: dllnums.so: dynamic loading not supported on this platform.
>
> I was sure that Mac OS X was among the platforms where this *doesn't*
> work, based on experiments a year or two ago. However I recently found
> that apparently it *does* after all work on my Mac. Since the original
> experiments I've upgraded the Mac to Leopard, and maybe I've even
> changed my OCaml version, though I don't remember for sure. Am I just
> plain wrong, or has this really only started to work recently?
>
> John.
>
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RE: [Caml-list] Dynamic loading on Mac OS X

[Harrison, John R]

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| See this post on beginner's list:
| http://tech.groups.yahoo.com/group/ocaml_beginners/message/6905

Thanks, that almost certainly explains it: dynamic loading for Intel
Macs started working in 3.10, though it worked earlier on PPC.

John.


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