Player compilation in with Mex

Hi,

Player, a robot controller server, can be driven by clients. I am trying to compile a client using a librery (playerc++). The compilation completes (which shows that the header files are found), but the linking failes. This is the code that I use for linking:

 mex example0.cpp -v -Iinclude/ -Llib -lplayerc++

The result of the mex is listed below. There seems to be a linking error. Does anyone have an idea about how to solve this linking error?

>> mex example0.cpp -v -Iinclude/ -Llib -lplayerc++ 
-> Default options filename found in C:\Users\jsteckel\AppData\Roaming\MathWorks\MATLAB\R2010b 
---------------------------------------------------------------- 
->    Options file           = C:\Users\jsteckel\AppData\Roaming\MathWorks\MATLAB\R2010b\mexopts.bat 
      MATLAB                 = C:\Program Files\MATLAB\R2010b 
->    COMPILER               = cl 
->    Compiler flags: 
         COMPFLAGS           = /c /Zp8 /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           =  -Iinclude/ 
         Name switch         = /Fo 
->    Pre-linking commands   =  
->    LINKER                 = link 
->    Link directives: 
         LINKFLAGS           = /dll /export:mexFunction /LIBPATH:"C:\Program Files\MATLAB\R2010b\extern\lib\win64\microsoft" libmx.lib libmex.lib libmat.lib /MACHINE:X64 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 /incremental:NO /implib:"C:\Users\jsteckel\AppData\Local\Temp\mex_fSKLsi\templib.x" /MAP:"example0.mexw64.map" 
         LINKDEBUGFLAGS      = /DEBUG /PDB:"example0.mexw64.pdb" 
         LINKFLAGSPOST       =  
         Name directive      = /out:"example0.mexw64" 
         File link directive =  
         Lib. link directive =  
         Rsp file indicator  = @ 
->    Resource Compiler      = rc /fo "mexversion.res" 
->    Resource Linker        =  
---------------------------------------------------------------- 

--> cl  -Iinclude/ /c /Zp8 /GR /W3 /EHs /D_CRT_SECURE_NO_DEPRECATE /D_SCL_SECURE_NO_DEPRECATE /D_SECURE_SCL=0 /DMATLAB_MEX_FILE /nologo /MD /FoC:\Users\jsteckel\AppData\Local\Temp\mex_fSKLsi\example0.obj -I"C:\Program Files\MATLAB\R2010b"\extern\include /O2 /Oy- /DNDEBUG -DMX_COMPAT_32 example0.cpp 

example0.cpp 
include/libplayerc++/playerclient.h(127) : warning C4251: 'PlayerCc::PlayerClient::mProxyList' : class 'std::list<_Ty>' needs to have dll-interface to be used by clients of class 'PlayerCc::PlayerClient' 
        with 
        [ 
            _Ty=PlayerCc::ClientProxy * 
        ] 
include/libplayerc++/playerclient.h(129) : warning C4251: 'PlayerCc::PlayerClient::mDeviceList' : class 'std::list<_Ty>' needs to have dll-interface to be used by clients of class 'PlayerCc::PlayerClient' 
        with 
        [ 
            _Ty=playerc_device_info_t 
        ] 
    Contents of C:\Users\jsteckel\AppData\Local\Temp\mex_fSKLsi\mex_tmp.rsp: 
  C:\Users\jsteckel\AppData\Local\Temp\mex_fSKLsi\example0.obj 

--> link /out:"example0.mexw64" /dll /export:mexFunction /LIBPATH:"C:\Program Files\MATLAB\R2010b\extern\lib\win64\microsoft" libmx.lib libmex.lib libmat.lib /MACHINE:X64 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 /incremental:NO /implib:"C:\Users\jsteckel\AppData\Local\Temp\mex_fSKLsi\templib.x" /MAP:"example0.mexw64.map"  @C:\Users\jsteckel\AppData\Local\Temp\mex_fSKLsi\mex_tmp.rsp  lib\playerc++.lib  

     Creating library C:\Users\jsteckel\AppData\Local\Temp\mex_fSKLsi\templib.x and object C:\Users\jsteckel\AppData\Local\Temp\mex_fSKLsi\templib.exp 
  example0.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl PlayerCc::PlayerClient::~PlayerClient(void)" (__imp_??1PlayerClient@PlayerCc@@QEAA@XZ) referenced in function mexFunction 
  example0.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __cdecl PlayerCc::Position2dProxy::~Position2dProxy(void)" (__imp_??1Position2dProxy@PlayerCc@@UEAA@XZ) referenced in function mexFunction 
  example0.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl PlayerCc::Position2dProxy::Position2dProxy(class PlayerCc::PlayerClient *,unsigned int)" (__imp_??0Position2dProxy@PlayerCc@@QEAA@PEAVPlayerClient@1@I@Z) referenced in function mexFunction 
  example0.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl PlayerCc::PlayerClient::PlayerClient(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,unsigned int,int)" (__imp_??0PlayerClient@PlayerCc@@QEAA@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@IH@Z) referenced in function mexFunction 
  example0.mexw64 : fatal error LNK1120: 4 unresolved externals 

    C:\PROGRA~1\MATLAB\R2010B\BIN\MEX.PL: Error: Link of 'example0.mexw64' failed.

[Kaustubha Govind]

Is playerc++ a 32- or 64-bit library?

[Saurabh Thakur]

Does the library playerc++ depend on any other library? If so, you might have to add the dependent libraries in the MEX command as well.

[Jan]

Actually, I am not all to shure. The player docu is very obfuscated, so it is all a but tricky.

I think player is a 32 bit library, which could be the reason of the compilation failure (I use windows 7 with matlab 64bit)

Answer 1

[Kaustubha Govind]

If playerc++ is a 32-bit binary, you cannot load it from 64-bit MATLAB MEX Functions. You could either install 32-bit MATLAB on your 64-bit machine, or obtain a 64-bit version of the library.