Not able to compile Mex file on 2016b

Hello! Thanks for your help!

I am using a windows 64-bit with a trial version.( I own a 2013 version but due to its inability to download windows 64 bit has led to other compiling problems).

In Short: I can't compile this mex file or have MATLAB recognize any other compiler.

    % code Trial>> run vl_compilenn.m
Warning: CL.EXE not found in PATH. Trying to guess out of mex setup. 
> In vl_compilenn>check_clpath (line 580)
  In vl_compilenn (line 413)
  In run (line 96) 
'cl.exe' is not recognized as an internal or external command, 
operable program or batch file. 
Error using vl_compilenn>check_clpath (line 591)
Unable to find cl.exe
Error in vl_compilenn (line 413)
    check_clpath(); % check whether cl.exe in path
Error in run (line 96)
evalin('caller', [script ';']);

Also important:

% code
Trial>> mex -setup C
MEX configured to use 'MinGW64 Compiler (C)' for C language compilation.
Warning: The MATLAB C and Fortran API has changed to support MATLAB
   variables with more than 2^32-1 elements. In the near future
   you will be required to update your code to utilize the
   new API. You can find more information about this at:
   http://www.mathworks.com/help/matlab/matlab_external/upgrading-mex-files-to-use-64-bit-api.html.

Another important thing is that I have also installed Intel Parallel Studio XE 2017 as another compiler.

[Walter Roberson]

Related:

https://www.mathworks.com/matlabcentral/answers/261684-run-matlab-vl_compilenn-show-error

https://www.mathworks.com/matlabcentral/answers/300488-unable-to-run-vl_compilenn

Answer 1

[Walter Roberson]

After checking that you are using a supported compiler (see http://www.mathworks.com/matlabcentral/answers/303450-supported-compilers-for-2016b-windows-64#answer_235110) you need to

mex -setup C++

vl_compilenn requires a C++ compiler, not just C compiler.

Also it turns out that vl_compilenn is a function. I recommend that instead of

run vl_compilenn.m

that you use

vl_compilenn('verbose', 1)

and if you have difficulty then show us the output.

Answer 2

[fulan liu]

hi, I meet the problem as well, do you solve the it?