I will follow up on this, first please look at the available
documentation:
man NSModule
man 3 dyld
man 1 dyld
man ld
Read these and you will be up and running.
You should be linking loadable modules with the -module flag, if
for some reason the software you are porting requires the
behavior that the module be both run time loaded and linked
against then you might be able to use the dlcompat which is
available on the fink package submissions tracker item:
(I didn't write it, it was written by Jorge Acereda Macia, and
slightly modified by me).
There are some caveats to using dylibs as loadable modules.
1) If you need to have undefined symbols, you need
-flat_namespace linkage.
2) You can't load dylibs locally, they must be global. - So no
symbols may be the same even in different modules. (unless you
didn't need undefined symbols, in which case you can use two
level namespace).
3) You can't unload dylibs (although the dl spec says that this
is okay, it is not expected behavior)
4) The module must dlopen and dlsym any symbols it needs from
the application, Not required if linking with -module
The other problem is that the code on the tracker item may not
work. No guarantees.
If you can avoid it, do not try to use dylibs (MH_DYLIB) as
loadable modules, use MH_BUNDLE instead.
Also, the dlcompat currently in use by fink is a modification of
the code available from the cctools project on darwin cvs. If
you really want to get into the whole thing check it out.
Peter
On Sunday, March 17, 2002, at 06:49 AM, David R. Morrison wrote:
"ToolTech Darwin" <email@hidden> wrote:
We are missing the dlopen and therefor we have looked into the
dyld methods.
When trying to map a .dylib file to an image I get an error
NS...InapropriateFile ??
What Is the correct way to link and compile dylib files so they are
compatible with .so files in Unix + dlopen,dlsym.
What can be wrong when I get the innapropriate file error ?
Note that although dlcompat is released as part of the fink project, it
can be used independently (and is in fact used by other projects such
as gnu-darwin).
-- Dave
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References:
>Re: dlopen (From: "David R. Morrison" <email@hidden>)
