Plugins, Linking, and Makefiles

Downloaded the new version and was excited to see that the there was an 
example plugin.  (I was also pleased to discover that a problem with 
running on my G5 disappeared -- previously, long running simulations 
would become unresponsive to external commands, like pausing.)  I set 
to trying to get the sample plugin to work.  But ran into a few 
problems.

First, I noticed that BREVEPATH was set to "../../bin/breve" which 
wasn't right for the Guified Mac OS version.  So, looked to the CLI 
version.  Sure enough, the BREVEPATH looked right.  So, I moved over to 
the samples directory and tried a build:

segin:/Applications/breve/breve_darwin/plugins/samples wtaysom$ make
make -f Makefile `uname`
make objects 'DEFINES=-DMACOSX'
cc -DMACOSX -c cSample.c -I..
g++ -DMACOSX -c c++Sample.cpp -I..
cc -bundle -o cSample_plugin.o cSample.o -bundle_loader ../../bin/breve
ld: Undefined symbols:
_slMessage
_stNewSteveCall
make[1]: *** [Darwin] Error 1
make: *** [all] Error 2
segin:/Applications/breve/breve_darwin/plugins/samples wtaysom$

That was curious, so I decided to check if "../../bin/breve" had the 
symbols "_slMessage" and "_stNewSteveCall":

segin:/Applications/breve/breve_darwin/bin wtaysom$ nm -a breve | grep 
'_slMessage'
segin:/Applications/breve/breve_darwin/bin wtaysom$ nm -a breve | grep 
'_stNewSteveCall'
segin:/Applications/breve/breve_darwin/bin wtaysom$

No, luck.  Well, maybe this is just a problem with the CLI version.  
Maybe the GUI version has the symbols:

segin:/Applications/breve/breve.app/Contents/MacOS wtaysom$ nm -a breve 
| grep '_slMessage'
00023644 T _slMessage
segin:/Applications/breve/breve.app/Contents/MacOS wtaysom$ nm -a breve 
| grep '_stNewSteveCall'
00067764 T _stNewSteveCall
segin:/Applications/breve/breve.app/Contents/MacOS wtaysom$

Looks like it does.  Let's change BREVEPATH to point to the right place 
and try again:

segin:/Applications/breve/plugins/samples wtaysom$ make Darwin
make objects 'DEFINES=-DMACOSX'
cc -DMACOSX -c cSample.c -I..
g++ -DMACOSX -c c++Sample.cpp -I..
cc -bundle -o cSample_plugin.o cSample.o -bundle_loader 
../../breve.app/Contents/MacOS/breve
cc -dynamiclib -o cSample_plugin.o cSample.o
ld: Undefined symbols:
_slMessage
_stNewSteveCall
/usr/bin/libtool: internal link edit command failed
make: *** [Darwin] Error 1
segin:/Applications/breve/plugins/samples wtaysom$

No, luck in the end, but we did get a step further.  Can anyone give us 
some insight into how this is supposed to work, and how to make it so.

Thanks,
William

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