Re: Mac OS X .dylib not working

[ludo@gnu.org (Ludovic Courtès)]

Hi,

Hans Aberg <haberg@math.su.se> writes:

> On 2 Feb 2010, at 17:52, Bob Friesenhahn wrote:
>
>> Unless I am missing something, the question to be answered is if
>> Guile requests opening modules using a name like  "module.so"
>> (assuming a particular naming scheme),  "module.la" (using libltdl
>> as originally intended), or bare  "module" (using libltdl
>> heuristics, which tries several  incantations, such as looking for
>> .la, and .so).

[...]

>   handle = lt_dlopenext (fname);

The Guile manually specifically tells that FNAME should not contain an
extension.

Hans: in <DE114180-13F6-498C-9E48-9407E5CFBBA7@math.su.se> [0], you said
you compiled the module with “gcc -dynamiclib -lguile -o
libguile-bessel.so bessel.c”.  Is it the right incantation for loadable
modules (not shared libraries) on Darwin?

Surprisingly, I just noticed that Guile itself doesn’t use the ‘-module’
option of Libtool when creating its ‘libguile-srfi-srfi-1’ module (which
is meant to be dlopened *or* directly linked against), although this has
never caused any problems on OS X.  If you search for that in [1],
‘libguile-srfi-srfi-1’ is actually created with ‘-dynamiclib’.

(Either way, you’d probably be better off using Libtool to create the
module.)

Thanks,
Ludo’.

[0] http://thread.gmane.org/gmane.lisp.guile.bugs/4476
[1] http://hydra.nixos.org/build/275625/log/raw