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List:       squeak-vm-dev
Subject:    [Vm-dev] How to link dynamic library into a Squeak plugin on Mac
From:       Simon Holland <s.holland () open ! ac ! uk>
Date:       2007-08-27 10:35:20
Message-ID: 12344712.post () talk ! nabble ! com
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Bert Freudenberg-2 wrote:
> 
> 
> On Aug 25, 2007, at 16:54 , Simon Holland wrote:
> 
> > 
> > 
> > Can anyone point to any examples or info on how to
> > link a dynamic library into a Squeak plugin  build on Mac Intel?
> > 
> > None of the following work
> > 
> > PLIBS=$PLIBS
> > /Users/simon/squeak/platforms/unix/plugins/PortMidiLitePlugin/i386/ 
> > libportmidi.dylib
> > PLIBS=$PLIBS /usr/local/lib/libportmidi.dylib
> > PLIBS=$PLIBS  -dynamiclib -Wl,-single_module -Wl,-install_name,
> > /usr/local/lib/libportmidi.dylib
> > PLIBS=$PLIBS  -dynamiclib -Wl,-single_module -Wl,-install_name,  
> > lportmidi
> > PLIBS=$PLIBS   lportmidi
> > 
> > (They compile fine but fail to load)
> > 
> > libportmidi.dylib is installed in /usr/lib
> > and the environment  variable
> > DYLD_LIBRARY_PATH is set to /usr/local/lib
> > 
> > Recasting the plugin as a command line C application,
> > and dropping the relevant dylib into the  XCode window
> > works with no bother.
> > 
> > Cheers
> > Simon
> 
> Last time I needed to do this I started with the XCode project for  
> another plugin from SVN, modified it for my plugin, and just added  
> the libs to it. Don't remember the details though.
> 
> - Bert -
> 
> 

Thanks Bert!

In case anyone should be looking for the answer  at a later date, here is
how to create an external squeak plugin on intel mac that links into an
external library (e.g. a dylib or .a static library).

1/ Use xcode to make a carbon bundle project from scratch.

2/ Apart from your plugin code and your external library you will need to
add the exactly correct minimum set of  (slightly edited) vm header files.

3/ The set of headers  and the necessary edit has been documented in
Japanese by the Takashi Yamamiya
http://www.smalltalk.jp/Squeak-ja/archives/lists.squeakfoundation.org/squeak-ja/2004-August/001783.html
 and written up  in English by Gerald Leeb http://g-24.net/squeak/ode.html.

4/ If you then run a conventional unix vm/plugin  macintel build  for your
plugin using a plugin Makefile.inc of 
PLIBS=$PLIBS  -L/usr/local/lib  -dynamiclib -Wl,-single_module
-Wl,-install_name, lportmidi. 
(in my case, given that I was linking to portmidi and put the dylib in that
location )
then the plugin will end up in the package contents of the VM.

4a/ Instead of step 4 you can just manually drop the plugin into the package
contents of  a VM of the right version number, which I assume is the normal
deployment route.

Thanks all!

Simon

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