Help using MatLab coder.

Hey! I am trying to use the MatLab coder but I keep getting the same error over and over again. No matter what changes I make, the same error keeps appearing. Here is the MatLabcode I am trying to convert to C++:

function [result] = test(x,h)
result =x+h;

This is a really easy code that the coder should be able to compile without any hesitation but still it is not able to make the conversion. I have declared the datatypes on the coder project window. I am using MatLab version R2011a. I have also configured my Visual Studio compiler with MatLab using mex -setup. This is the error I am getting (in the Target Build Log):

1   Setting environment for using Microsoft Visual Studio 2010 x64 tools.
    2   
    3   Microsoft (R) Program Maintenance Utility Version 10.00.30319.01
    4   Copyright (C) Microsoft Corporation.  All rights reserved.
    5   
    6   ### Compiling test.c
    7     cl   -DUSE_RTMODEL /Od /Oy- -DMODEL=test -DRT -DNUMST=1  -DTID01EQ=0 -DNCSTATES=0  -DMT=0 -DHAVESTDIO   -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_AMD64_=1 -DWIN64 -D_WIN64  -DWIN32 -D_WIN32 -W4 -D_WINNT -D_WIN32_WINNT=0x0500 -DNTDDI_VERSION=0x05000000 -D_WIN32_IE=0x0500 -DWINVER=0x0500  -D_MT -MT /wd4996 test.c
    8   test.c
    9   ### Compiling test_initialize.c
   10     cl   -DUSE_RTMODEL /Od /Oy- -DMODEL=test -DRT -DNUMST=1  -DTID01EQ=0 -DNCSTATES=0  -DMT=0 -DHAVESTDIO   -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_AMD64_=1 -DWIN64 -D_WIN64  -DWIN32 -D_WIN32 -W4 -D_WINNT -D_WIN32_WINNT=0x0500 -DNTDDI_VERSION=0x05000000 -D_WIN32_IE=0x0500 -DWINVER=0x0500  -D_MT -MT /wd4996 test_initialize.c
   11   test_initialize.c
   12   ### Compiling test_terminate.c
   13     cl   -DUSE_RTMODEL /Od /Oy- -DMODEL=test -DRT -DNUMST=1  -DTID01EQ=0 -DNCSTATES=0  -DMT=0 -DHAVESTDIO   -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_AMD64_=1 -DWIN64 -D_WIN64  -DWIN32 -D_WIN32 -W4 -D_WINNT -D_WIN32_WINNT=0x0500 -DNTDDI_VERSION=0x05000000 -D_WIN32_IE=0x0500 -DWINVER=0x0500  -D_MT -MT /wd4996 test_terminate.c
   14   test_terminate.c
   15   ### Compiling rt_nonfinite.c
   16     cl   -DUSE_RTMODEL /Od /Oy- -DMODEL=test -DRT -DNUMST=1  -DTID01EQ=0 -DNCSTATES=0  -DMT=0 -DHAVESTDIO   -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_AMD64_=1 -DWIN64 -D_WIN64  -DWIN32 -D_WIN32 -W4 -D_WINNT -D_WIN32_WINNT=0x0500 -DNTDDI_VERSION=0x05000000 -D_WIN32_IE=0x0500 -DWINVER=0x0500  -D_MT -MT /wd4996 rt_nonfinite.c
   17   rt_nonfinite.c
   18   ### Compiling rtGetNaN.c
   19     cl   -DUSE_RTMODEL /Od /Oy- -DMODEL=test -DRT -DNUMST=1  -DTID01EQ=0 -DNCSTATES=0  -DMT=0 -DHAVESTDIO   -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_AMD64_=1 -DWIN64 -D_WIN64  -DWIN32 -D_WIN32 -W4 -D_WINNT -D_WIN32_WINNT=0x0500 -DNTDDI_VERSION=0x05000000 -D_WIN32_IE=0x0500 -DWINVER=0x0500  -D_MT -MT /wd4996 rtGetNaN.c
   20   rtGetNaN.c
   21   ### Compiling rtGetInf.c
   22     cl   -DUSE_RTMODEL /Od /Oy- -DMODEL=test -DRT -DNUMST=1  -DTID01EQ=0 -DNCSTATES=0  -DMT=0 -DHAVESTDIO   -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_AMD64_=1 -DWIN64 -D_WIN64  -DWIN32 -D_WIN32 -W4 -D_WINNT -D_WIN32_WINNT=0x0500 -DNTDDI_VERSION=0x05000000 -D_WIN32_IE=0x0500 -DWINVER=0x0500  -D_MT -MT /wd4996 rtGetInf.c
   23   rtGetInf.c
   24   ### Linking ...
   25     C:\PROGRA~1\MATLAB\R2011a\sys\perl\win32\bin\perl C:\PROGRA~1\MATLAB\R2011a\rtw\c\tools\mkvc_lnk.pl test.lnk test.obj test_initialize.obj test_terminate.obj rt_nonfinite.obj rtGetNaN.obj rtGetInf.obj   
   26     link /RELEASE  /INCREMENTAL:NO /NOLOGO -subsystem:console,5.02  kernel32.lib  ws2_32.lib mswsock.lib advapi32.lib libcpmt.lib      @test.lnk @test_ref.rsp -out:C:\Users\Pixel\DOCUME~1\PRUEBA~2\test.exe
   27   LIBCMT.lib(crt0.obj) : error LNK2019: unresolved external symbol main referenced in function __tmainCRTStartup
   28   C:\Users\Pixel\DOCUME~1\PRUEBA~2\test.exe : fatal error LNK1120: 1 unresolved externals
   29   NMAKE : fatal error U1077: '"c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\link.EXE"' : return code '0x460'
   30   Stop.
   31   The make command returned an error of 2
   32   'An_error_occurred_during_the_call_to_make' is not recognized as an internal or external command,
   33   operable program or batch file.
   34

I hope I can find a solution to this problem. Thank you very much for your help!

[vcmorini]

I am having the same problem. MinGW compiles fine.

Answer 1

[Titus Edelhofer]

Hi,

when compiling to an executable you need to provide a main function (a file containing

void main()
{
/* call the MATLAB coder code */
}

Don't have MATLAB available on this machine, but somewhere on the MATLAB coder settings you specify a file containing the main function ...

Titus