MATLAB mexFunction() with Cygwin GCC Windows

[Boyd Edmondson]

I have successfully built/linked MATLAB mex files on Windows using GCC in Cygwin.  Unfortunately, it has a runtime error.  It appears the error is due to mismatched calling coventions for parameter passing.  The MATLAB interpreter successfully invokes the mexFunction() in my shared library (.mexw32), but the passed parameters are "corrupted".

I've tried GCC's "attribute" to set the mexFunction() to "cdecl", "stdcall", and "fastcall", but still no luck.

Anyone know the solution?

Details follow:

MATLAB mexopts.bat
=================
@echo off

rem Cygwin GCC on Windows

set MATLAB=%MATLAB%

set COMPILER=gcc
set COMPFLAGS=-mno-cygwin -D_WIN32 -shared -DMATLAB_MEX_FILE -Wall -c -msse3 -I"%ProgramFiles%\Pthreads\include" -I"%ProgramFiles%\Verasonics\Hal\Hal C\Includes" -o%MEX_NAME%.obj

set OPTIMFLAGS=-O3
set DEBUGFLAGS=-g3

set LINKER=gcc

set LINKFLAGS=-mno-cygwin -D_WIN32 -shared -DMATLAB_MEX_FILE -nostartfiles -L"%ProgramFiles%\Verasonics\Hal\Hal C\Shared Libraries" -lverasonicshalwindows -L"%ProgramFiles%\MATLAB\R2007a\bin\win32" -lmat -lmex -lmx

set LINKOPTIMFLAGS=-s
set LINKDEBUGFLAGS=

set NAME_OUTPUT=-o%MEX_NAME%.mexw32


myMex.c
========

#include <mex.h>
#include <stdio.h>

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{

    //x
    printf("We are not successfully passing parameters. We will be successful when 'nlhs' is '1' and 'nrhs' is '0'. They are: %d and %d\n", nlhs, nrhs);
    //x
    
    // Return the result as a string.
    plhs[0] = mxCreateString("Some text goes here");
    
    return;
}


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