I was wondering if there were any known issues with compiling using Matlab&#39;s mex compiler (which in turn uses and links with gcc) and using Boost.Statechart. &nbsp;When I implemented my statechart, I tested it using a separate main() file and it works 100%. &nbsp;When I compile using mex into a Matlab MEX file, I seem to lose the functionality of the event triggers. &nbsp;I&#39;ve tried several things to figure out what is happening, but all I can ascertain is that if I use the iterators state_begin() and state_end() to access all internal states, the loop never executes. &nbsp;I tried to dereference state_begin(), but got a segfault. &nbsp;My initial approach was to use the state_downcast&lt;&gt;(), but this didn&#39;t work in SImulink either. &nbsp;My final suspicion was that it had something to do with the extern &quot;C&quot; business, but admittedly, I don&#39;t understand the effects of this statement other than how the symbol appears in the library (i.e. avoiding mangling). &nbsp;I get this same behavior on OS X 10.5 w/ gcc 4.0.1 as well as on Linux x86_64 with gcc <a href="http://4.2.4.">4.2.4.</a><div>
<br></div><div>If anyone wants to have my Simulink model to test, I could send that as well.<br><div><br></div><div>I&#39;ve attached the following files:</div><div><br></div><div>ctrl_machine.[ch]pp - My state machine implementation/declaration.</div>
<div>main.cpp &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;- My test program</div><div>air_controller.cpp &nbsp; &nbsp;- The C++ SFunction implementation used in Simulink.</div><div><br></div><div>mex uses the following compilation steps with gcc/g++</div><div>
<br></div><div><div><br></div><div>-&gt; g++-4.2 -c &nbsp;-I/opt/matlab/extern/include -I/opt/matlab/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread &nbsp;-DMX_COMPAT_32 -O -DNDEBUG &nbsp;&quot;ctrl_machine.cpp&quot;<br>
</div><div><br></div><div>-&gt; g++-4.2 -c &nbsp;-I/opt/matlab/extern/include -I/opt/matlab/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread &nbsp;-DMX_COMPAT_32 -O -DNDEBUG &nbsp;&quot;air_controller.cpp&quot;</div>
<div><br></div><div>-&gt; gcc-4.2 -c &nbsp;-I/opt/matlab/extern/include -I/opt/matlab/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE &nbsp;-fexceptions -fPIC -fno-omit-frame-pointer -pthread &nbsp;-DMX_COMPAT_32 -O -DNDEBUG &nbsp;&quot;/opt/matlab/extern/src/mexversion.c&quot;</div>
<div><br></div><div>-&gt; g++-4.2 -O -pthread -shared -Wl,--version-script,/opt/matlab/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined -o &nbsp;&quot;ctrl_machine.mexa64&quot; &nbsp;ctrl_machine.o air_controller.o mexversion.o &nbsp;-Wl,-rpath-link,/opt/matlab/bin/glnxa64 -L/opt/matlab/bin/glnxa64 -lmx -lmex -lmat -lm -lm</div>
<div><br></div></div><div>-----</div><div>Thanks,</div><div><br></div><div>Derek Ditch</div><div><br></div></div>