C++ Mex compilation error. SharedMemory.cpp

Hello,

I am trying to compile a SharedMemory.cpp via mex and Visual Studio 2010 c++ compiler on a Win32 machine.

What I input :

mex -v -O -win32 -I'C:\Program Files\Boost\boost_1_51' SharedMemory.cpp

The output :

-> Default options filename found in C:\Users\Skyhr\AppData\Roaming\MathWorks\MATLAB\R2012b 
---------------------------------------------------------------- 
->    Options file           = C:\Users\Skyhr\AppData\Roaming\MathWorks\MATLAB\R2012b\mexopts.bat 
      MATLAB                 = C:\Program Files\MATLAB\R2012b 
->    COMPILER               = cl 
->    Compiler flags: 
         COMPFLAGS           = /c /GR /W3 /EHs /D_CRT_SECURE_NO_DEPRECATE /D_SCL_SECURE_NO_DEPRECATE /D_SECURE_SCL=0 /DMATLAB_MEX_FILE /nologo /MD 
         OPTIMFLAGS          = /O2 /Oy- /DNDEBUG 
         DEBUGFLAGS          = /Z7 
         arguments           =  -I"C:\Program Files\Boost\boost_1_51" 
         Name switch         = /Fo 
->    Pre-linking commands   =  
->    LINKER                 = link 
->    Link directives: 
         LINKFLAGS           = /dll /export:mexFunction /LIBPATH:"C:\Program Files\MATLAB\R2012b\extern\lib\win32\microsoft" libmx.lib libmex.lib libmat.lib /MACHINE:X86 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /manifest /incremental:NO /implib:"C:\Users\Skyhr\AppData\Local\Temp\mex_hno3II\templib.x" /MAP:"SharedMemory.mexw32.map" 
         LINKDEBUGFLAGS      = /debug /PDB:"SharedMemory.mexw32.pdb" 
         LINKFLAGSPOST       =  
         Name directive      = /out:"SharedMemory.mexw32" 
         File link directive =  
         Lib. link directive =  
         Rsp file indicator  = @ 
->    Resource Compiler      = rc /fo "mexversion.res" 
->    Resource Linker        =  
---------------------------------------------------------------- 

--> cl  -I"C:\Program Files\Boost\boost_1_51" /c /GR /W3 /EHs /D_CRT_SECURE_NO_DEPRECATE /D_SCL_SECURE_NO_DEPRECATE /D_SECURE_SCL=0 /DMATLAB_MEX_FILE /nologo /MD /FoC:\Users\Skyhr\AppData\Local\Temp\mex_hno3II\SharedMemory.obj -I"C:\Program Files\MATLAB\R2012b\extern\include" -I"C:\Program Files\MATLAB\R2012b\simulink\include" /O2 /Oy- /DNDEBUG -DMX_COMPAT_32 SharedMemory.cpp 

SharedMemory.cpp 
SharedMemory.cpp(125) : warning C4996: 'strcmpi': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strcmpi. See online help for details. 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\string.h(245) : see declaration of 'strcmpi' 
SharedMemory.cpp(177) : warning C4996: 'strcmpi': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strcmpi. See online help for details. 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\string.h(245) : see declaration of 'strcmpi' 
SharedMemory.cpp(231) : warning C4996: 'strcmpi': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strcmpi. See online help for details. 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\string.h(245) : see declaration of 'strcmpi' 
SharedMemory.cpp(262) : warning C4996: 'strcmpi': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strcmpi. See online help for details. 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\string.h(245) : see declaration of 'strcmpi' 
SharedMemory.cpp(546) : error C2027: use of undefined type 'mxArray_tag' 
        c:\users\skyhr\dropbox\matlab\sharedmatrix_windows_by_andrew_smith\SharedMemory.hpp(83) : see declaration of 'mxArray_tag' 
SharedMemory.cpp(546) : error C2227: left of '->data' must point to class/struct/union/generic type 
SharedMemory.cpp(546) : error C2228: left of '.number_array' must have class/struct/union 
SharedMemory.cpp(546) : error C2228: left of '.reserved5' must have class/struct/union 
SharedMemory.cpp(547) : error C2027: use of undefined type 'mxArray_tag' 
        c:\users\skyhr\dropbox\matlab\sharedmatrix_windows_by_andrew_smith\SharedMemory.hpp(83) : see declaration of 'mxArray_tag' 
SharedMemory.cpp(547) : error C2227: left of '->data' must point to class/struct/union/generic type 
SharedMemory.cpp(547) : error C2228: left of '.number_array' must have class/struct/union 
SharedMemory.cpp(547) : error C2228: left of '.reserved6' must have class/struct/union 
SharedMemory.cpp(548) : error C2027: use of undefined type 'mxArray_tag' 
        c:\users\skyhr\dropbox\matlab\sharedmatrix_windows_by_andrew_smith\SharedMemory.hpp(83) : see declaration of 'mxArray_tag' 
SharedMemory.cpp(548) : error C2227: left of '->data' must point to class/struct/union/generic type 
SharedMemory.cpp(548) : error C2228: left of '.number_array' must have class/struct/union 
SharedMemory.cpp(548) : error C2228: left of '.reserved6' must have class/struct/union 
SharedMemory.cpp(584) : error C2027: use of undefined type 'mxArray_tag' 
        c:\users\skyhr\dropbox\matlab\sharedmatrix_windows_by_andrew_smith\SharedMemory.hpp(83) : see declaration of 'mxArray_tag' 
SharedMemory.cpp(584) : error C2227: left of '->data' must point to class/struct/union/generic type 
SharedMemory.cpp(584) : error C2228: left of '.number_array' must have class/struct/union 
SharedMemory.cpp(584) : error C2228: left of '.pdata' must have class/struct/union 
SharedMemory.cpp(586) : error C2027: use of undefined type 'mxArray_tag' 
        c:\users\skyhr\dropbox\matlab\sharedmatrix_windows_by_andrew_smith\SharedMemory.hpp(83) : see declaration of 'mxArray_tag' 
SharedMemory.cpp(586) : error C2227: left of '->data' must point to class/struct/union/generic type 
SharedMemory.cpp(586) : error C2228: left of '.number_array' must have class/struct/union 
SharedMemory.cpp(586) : error C2228: left of '.pimag_data' must have class/struct/union 

    C:\PROGRA~1\MATLAB\R2012B\BIN\MEX.PL: Error: Compile of 'SharedMemory.cpp' failed.

I am not very familiar with C++. Can someone please explain what the error is and how to fix it? From seeing others use this without any problems - the code should be working because others have compiled it and are using it without any problems. The cpp file uses libraries from the Boost library.

Answer 1

[James Tursa]

It looks like you are missing the definition of the struct mxArray_tag. This used to be part of the matrix.h file up to R2010a, but has since been deleted. Since you are using R2012b my guess is that is the root problem. The fix may be to simply include it manually based on what was published in an older version. E.g., see this link to Yair Altman's Undocumented MATLAB site for examples:

http://undocumentedmatlab.com/blog/matlabs-internal-memory-representation/

[Evan]

Hello, thank you very much for your response. Unfortunately, since I am such a dunce at C++ and its details, could you please provide a step by step example of "manually inserting" the definition of struct mxArray_tag? I am not understanding much, actually. But thank you very much :)

[James Tursa]

1) Go to the link above.

2) Scroll down about 2 1/2 pages until you get to the "struct mxArray_tag" block of text.

3) Copy this entire block of code into the top of the SharedMemory.cpp file.

4) Try mexing this altered file.

[Evan]

New Error :

SharedMemory.cpp 
SharedMemory.cpp(158) : warning C4996: 'strcmpi': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strcmpi. See online help for details. 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\string.h(245) : see declaration of 'strcmpi' 
SharedMemory.cpp(210) : warning C4996: 'strcmpi': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strcmpi. See online help for details. 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\string.h(245) : see declaration of 'strcmpi' 
SharedMemory.cpp(264) : warning C4996: 'strcmpi': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strcmpi. See online help for details. 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\string.h(245) : see declaration of 'strcmpi' 
SharedMemory.cpp(295) : warning C4996: 'strcmpi': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strcmpi. See online help for details. 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\string.h(245) : see declaration of 'strcmpi' 
    Contents of C:\Users\Skyhr\AppData\Local\Temp\mex_QaiNBo\mex_tmp.rsp: 
  C:\Users\Skyhr\AppData\Local\Temp\mex_QaiNBo\SharedMemory.obj 

--> link /out:"SharedMemory.mexw32" /dll /export:mexFunction /LIBPATH:"C:\Program Files\MATLAB\R2012b\extern\lib\win32\microsoft" libmx.lib libmex.lib libmat.lib /MACHINE:X86 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /manifest /incremental:NO /implib:"C:\Users\Skyhr\AppData\Local\Temp\mex_QaiNBo\templib.x" /MAP:"SharedMemory.mexw32.map"  @C:\Users\Skyhr\AppData\Local\Temp\mex_QaiNBo\mex_tmp.rsp   

LINK : fatal error LNK1104: cannot open file 'libboost_date_time-vc100-mt-1_51.lib' 

    C:\PROGRA~1\MATLAB\R2012B\BIN\MEX.PL: Error: Link of 'SharedMemory.mexw32' failed.

This is the first copy. The remaining two don't work either.

[James Tursa]

Where is libboost_date_time-vc100-mt-1_51.lib located? Try putting in in the same directory as SharedMemory.cpp.

[Evan]

Oh my God... hahaha

http://sourceforge.net/projects/boost/files/boost-binaries/1.51.0/

has a list of libraries, where I found the missing one. It doesn't work when I put it in the boost folder, but works when I put it in the folder containing SharedMemory.cpp. I have no idea WHY boost didn't automatically give this to me when I installed it, but hey, at least it got the job done.

Thank you very much! :)