Problems regarding installation

[Saif]

Hi,
I followed the steps to install gnumex by following the instructions on the page
http://gnumex.sourceforge.net/

When i tried to execute the command >>mex -v i got following error.

>> mex -v
This is mex, Copyright 1984-2007 The MathWorks, Inc.

-> Default options filename found in C:\Dokumente und Einstellungen\R74\Anwendungsdaten\MathWorks\MATLAB\R2009b
-------------------------------------------
->    Options file           = C:\Dokumente und Einstellungen\R74\Anwendungsdaten\MathWorks\MATLAB\R2009b\mexopts.bat
      MATLAB                 = C:\PROGRA~1\MATLAB\R2009b
->    COMPILER               = gcc
->    Compiler flags:
         COMPFLAGS           = -c -DMATLAB_MEX_FILE
         OPTIMFLAGS          = -O3
         DEBUGFLAGS          = -g
         arguments           = 
         Name switch         = -o
->    Pre-linking commands   = 
->    LINKER                 = C:\PROGRA~1\MATLAB\R2009b\sys\perl\win32\bin\perl.exe c:\gnumex\linkmex.pl
->    Link directives:
         LINKFLAGS           =  -LC:\DOKUME~1\R74\ANWEND~1\MATHWO~1\MATLAB\R2009b\gnumex
         LINKDEBUGFLAGS      = -g  -Wl,-image-base,0x28000000\n
         LINKFLAGSPOST       = 
         Name directive      = -o .mexw32
         File link directive = 
         Lib. link directive = 
         Rsp file indicator  = 
->    Resource Compiler      = C:\PROGRA~1\MATLAB\R2009b\sys\perl\win32\bin\perl.exe c:\gnumex\rccompile.pl  -o mexversion.res
->    Resource Linker        = 
-------------------------------------------

    Usage:
        MEX  sourcefile1 
             

      or (to build an Ada S-function):
        MEX   -ada <sfcn>.ads

    Use the -help option for more information, or consult the MATLAB API Guide.

  C:\PROGRA~1\MATLAB\R2009B\BIN\MEX.PL: Error: No file names given.

??? Error using ==> mex at 221
Unable to complete successfully.

I do not know how to resolve this issue. So if any of you has idea, please let me know.
Saif

[Fernando Lezama]

Did you find any solution to this?

I have the same problem.

[Kristjan Jonasson]

I believe gnumex is completely outdated by now. I have been using mex out of the box with Matlab recently on my Mac with no problems, connecting with C and then calling Fortran from C. I would use gfortran with the switch -std=legacy. I would also use a C gateway function to connect between Matlab and Fortran. I don’t know much about what would happen on a Windows machine, but note that Matlab now claims to support MinGW 6.3 C/C++.

Here is a simple example:

#include "mex.h"
// xy = prod_gw(x,y) calls prod.f do compute the scalar product dot(x,y)
// Returns silently with xy = 0 if not called with 2 arguments or if x and y 
// have different lengths. Other errors are not caught.

void prod_(double x[], double y[], double *xy, int *n);

void mexFunction( int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
  double *xy, *x, *y;
  int n;
  plhs[0] = mxCreateDoubleMatrix(1, 1, mxREAL);
  xy = mxGetPr(plhs[0]);
  *xy = 0;
  if (nrhs != 2) return;
  n = mxGetNumberOfElements(prhs[0]);
  if (n != mxGetNumberOfElements(prhs[0])) return;
  x = mxGetPr(prhs[0]);
  y = mxGetPr(prhs[1]);
  *xy = 30;
  prod_(x, y, xy, &n);
}

I could then have a compile-link script:

function mexprod()
  !/usr/local/bin/gfortran -c -std=legacy prod.f
  mex prod_gw.c prod.o
end

and compile and run with:

>> mexprod
>> prod_gw([1 2], [3 4])
ans = 
    11 

With the newest Matlab you could also use mxGetDoubles instead of mxGetPr and mex with

mex -R2018a prod_gw.c prod.o

(with no complex numbers you get the same results)