How to load shared library created in Matlab - matlab

Question

I tried to create an OpenModelica model with liquid flow and Media.
And I have a function in Matlab that calculates the PDE (partial differential equation) in pdetool.
I would like to create a shared dynamic library (.so file) in Matlab by MCR and load it in the model.
My platform: OpenModelica used on Linux or Mac OS. MCR on Linux and Mac OS installed.
In Matlab I can generate only DLL (may be it's possible to generate libmyfunc.so?).
When I try to compile the model with extern C function I got an error:
#omc +s test_matlab_so.mo func_mathlab.mo
#make -f test_matlab_so.makefile
/usr/bin/clang -Wimplicit-function-declaration -O0 -falign-functions -march=native -I"/opt/openmodelica/include/omc/c" -I. -DOPENMODELICA_XML_FROM_FILE_AT_RUNTIME -c -o test_matlab_so_functions.o test_matlab_so_functions.c
clang: warning: optimization flag '-falign-functions' is not supported
clang: warning: argument unused during compilation: '-falign-functions'
In file included from test_matlab_so_functions.c:7:
In file included from ./test_matlab_so_includes.h:4:
./shared_train/src/lib_summ.c:90:8: warning: implicit declaration of function 'GetModuleFileName' is invalid in C99 [-Wimplicit-function-declaration]
if (!GetModuleFileName(GetModuleHandle("lib_summ"), path_to_dll, _MAX_PATH))
^
./shared_train/src/lib_summ.c:90:26: warning: implicit declaration of function 'GetModuleHandle' is invalid in C99 [-Wimplicit-function-declaration]
if (!GetModuleFileName(GetModuleHandle("lib_summ"), path_to_dll, _MAX_PATH))
^
./shared_train/src/lib_summ.c:90:55: error: use of undeclared identifier 'path_to_dll'
if (!GetModuleFileName(GetModuleHandle("lib_summ"), path_to_dll, _MAX_PATH))
^
./shared_train/src/lib_summ.c:90:68: error: use of undeclared identifier '_MAX_PATH'
if (!GetModuleFileName(GetModuleHandle("lib_summ"), path_to_dll, _MAX_PATH))
^
./shared_train/src/lib_summ.c:94:37: error: use of undeclared identifier 'path_to_dll'
mclGetEmbeddedCtfStream(path_to_dll);
^
test_matlab_so_functions.c:19:16: warning: implicit declaration of function '_mlfSumm' is invalid in C99 [-Wimplicit-function-declaration]
_v_out_ext = _mlfSumm(_v_a_ext, _v_b_ext);
^
3 warnings and 3 errors generated.
make: *** [test_matlab_so_functions.o] Error 1
Can someone help me with integrating OpenModelica and Matlab?

Answer 1

I don't have much experience with Linux but I did the same thing in Windows using MCR. Check this out:
http://de.mathworks.com/matlabcentral/answers/94471-how-do-i-create-a-c-c-shared-library-with-matlab-compiler-that-can-be-used-in-a-microsoft-visual-c
When you do this, you will get a DLL as well as a static library. You need to copy both of them into the folder that your modelica code is located at and then set the library in the "Library" attibute of your modelica function which calls the external function.
Keep in mind that if you are using a 64 or 32 bit dymola, you are supposed to create the DLL using the same version of matlab correspondingly.