[Insight-developers] [ITK Community] Building Matlab Mex extensions that link to ITK?

[Tom Vercauteren]

Hi Kent,

A long time ago, I also submitted a patch to cmake to support mex file creation:
http://public.kitware.com/Bug/view.php?id=8207

It might have been pushed one step further in gerardus:
https://code.google.com/p/gerardus/source/browse/trunk/matlab/MatlabMakeMacros.cmake

It's closely related to what Matt proposed:
http://public.kitware.com/Bug/view.php?id=9240

At some point, I stopped using it because of issues with fPIC, static
libraries and linux 64 bit architecture (I was dealing not only with
ITK but a whole lot of different librairies as well)... It might need
some work to fix it but it might well still work if you are not using
libraries that Matlab also uses (e.g. QT).

Tom

On Tue, Nov 19, 2013 at 7:06 PM, Matt McCormick
<matt.mccormick at kitware.com> wrote:
> Hi Kent,
>
> I wrote this [1][2] a long time ago, but I have not used it recently.
> There is an ITK example.
>
> Hope this helps,
> Matt
>
> [1] http://www.cmake.org/Wiki/CMake/MatlabMex
> [2] http://github.com/thewtex/matlab-itk-import/tree/master
>
> On Tue, Nov 19, 2013 at 12:59 PM, Williams, Norman K
> <norman-k-williams at uiowa.edu> wrote:
>> Has anyone else come up with an elegant solution for this?
>>
>> If I want to call ITK from a Matlab MEX extension written in C++, I run
>> into problems with telling it the libraries with which to link.
>>
>> The ITK_LIBRARIES variable is a list of imported library targets which
>> CMake converts to actual library paths when it links a library or
>> executable.
>>
>> But to compile a MEX file, we're using a custom command along the lines of
>>
>>    add_custom_command(OUTPUT ${MEX_PREFIX}.${MATLAB_MEX_EXT}
>>                      COMMAND ${MATLAB_MEX_PATH} -cxx
>> ${CMAKE_CXX_FLAGS_Release} ${MEX_SRC_PATH}
>> ${ITK_INCLUDES} ${ITK_LIBRARIES}
>>                      -I${Teem_INCLUDE_DIR} -L${Teem_LIBRARY_DIR}  -lteem
>> ${ZLIB_LIBRARY}
>>                      DEPENDS ${MEX_SRC_PATH}
>>                      IMPLICIT_DEPENDS C ${MEX_SRC_PATH}
>>                      COMMENT "BUILDING MEX_FILE: ${MEX_SRC_PATH}" )
>>
>> But that doesn't work because CMake gives the target names in
>> ITK_LIBRARIES instead of the actual libraries.
>>
>> I tried this:
>>
>> find_package(ITK NO_MODULE REQUIRED)
>> include(${ITK_USE_FILE})
>>
>> set(ITK_LOCAL_LIBS)
>> foreach(lib ${ITK_LIBRARIES})
>>   get_target_property(_lib ${lib} IMPORTED_LOCATION)
>>
>>   list(APPEND ITK_LOCAL_LIBS ${_lib})endforeach()
>>
>> But all the IMPORTED_LOCATION for ITK libraries is _lib-NOTFOUND
>>
>>
>>
>> --
>> Kent Williams norman-k-williams at uiowa.edu
>>
>>
>>
>>
>>
>>
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