How do I correct this Linker error building a mex function? LINK : fatal error LNK1561: entry point must be defined

I'm trying to build a NVIDIA CUDA\C++ function supplied to me from a colleague. The linker gives me this error:

>> mex -L"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.0\lib\x64" -lcudart -lcuda -llibmex LINKFLAGS="/NODEFAULTLIB:LIBCMT" GpuInterp.cc scandata.c gpulink.o Microsoft (R) Incremental Linker Version 9.00.21022.08 Copyright (C) Microsoft Corporation. All rights reserved.

C:\Users\Tony\AppData\Local\Temp\mex_vQULwR\GpuInterp.obj C:\Users\Tony\AppData\Local\Temp\mex_vQULwR\scandata.obj gpulink.o LINK : fatal error LNK1561: entry point must be defined

C:\PROGRA~1\MATLAB\R2011B\BIN\MEX.PL: Error: Link of 'GpuInterp.mexw64' failed.

Error using mex (line 206) Unable to complete successfully.

------------------------------------------------ Here are my Compiler and Linker configurations: ------------------------------------------------

>> cc = mex.getCompilerConfigurations()

cc =

mex.CompilerConfiguration
Package: mex

Properties:
          Name: 'Microsoft Visual C++ 2008'
  Manufacturer: 'Microsoft'
      Language: 'C++'
       Version: '9.0'
      Location: 'C:\Program Files (x86)\Microsoft Visual Studio 9.0'
       Details: [1x1 mex.CompilerConfigurationDetails]

Methods

>> cc.Details

ans =

mex.CompilerConfigurationDetails
Package: mex

Properties:
       CompilerExecutable: 'cl'
            CompilerFlags: [1x115 char]
        OptimizationFlags: '/O2 /Oy- /DNDEBUG'
               DebugFlags: '/Z7'
         LinkerExecutable: 'link'
              LinkerFlags: [1x317 char]
  LinkerOptimizationFlags: ''
         LinkerDebugFlags: '/DEBUG /PDB:"%OUTDIR%%MEX_NAME%%MEX_EXT%.pdb"'

Methods

>> cc.Details.CompilerFlags

ans =

/c /GR /W3 /EHs /D_CRT_SECURE_NO_DEPRECATE /D_SCL_SECURE_NO_DEPRECATE /D_SECURE_SCL=0 /DMATLAB_MEX_FILE /nologo /MD

>> cc.Details.LinkerFlags

ans =

/dll /export:%ENTRYPOINT% /LIBPATH:"%LIBLOC%" 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:"%LIB_NAME%.x" /MAP:"%OUTDIR%%MEX_NAME%%MEX_EXT%.map"

>>

Answer 1

[Kaustubha Govind]

Do you have the required mexFunction entry point defined in one of your source files?

[Tony]

Yes I do, in the first file compiled GpuInterp.cc

[Kaustubha Govind]

Did you be sure to use the exact function prototype:

void mexFunction(int nlhs, mxArray *plhs[], int nrhs,

const mxArray *prhs[]);

Answer 2

[Tony]

Yes I do, in the first compiled file GpuInterp.cc