MATLAB: Mex -setup does not show gcc 4.7.3 compiler with Matlab 2013b + (ubuntu) Linux 64 bit

2013bmexmex compilerUbuntu

When I run 'mex -setup' I get:

>> mex -setup
      Options files control which compiler to use, the compiler and link command
      options, and the runtime libraries to link against.
      Using the 'mexsh -setup' command selects an options file that is
      placed in /home/wouter/.matlab/R2013b and used by default for 'mexsh'. An options 
      file in the current working directory or specified on the command line 
      overrides the default options file in /home/wouter/.matlab/R2013b.
      To override the default options file, use the 'mexsh -f' command
      (see 'mexsh -help' for more information).
The options files available for mexsh are:
    1: /usr/local/MATLAB/R2013b/bin/mexopts.sh : 
        Template Options file for building MEX-files
    0: Exit with no changes
Enter the number of the compiler (0-1):

Where is my gcc compiler? When I look in /usr/bin/ the binary/executable/link of gcc is clearly there which as far as I read on the web should be located there.

Best Answer

Which gcc is it? gcc 4.7.x is what is supported in R2013b

http://www.mathworks.com/support/compilers/R2013b/index.html?sec=glnxa64

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MATLAB: Use mex files in matlab for MAC

Rui - it may be helpful to attach the files so that we know what you code you have. I suspect that you have at least one m-file that calls one or more MEX functions that are in C-files i.e. files with a c extension (written in the C programming language).

I have a Mac as well, and it is easy to build the MEX-functions from C/C++ as per the documentation found at the link MEX.

To setup, you need a C/C++ compiler. In the MATLAB Command Window, type

 mex -setup C

What do you see? When I run this command, I observe

 MEX configured to use 'Xcode with Clang' for C language compilation.

You may need to install Xcode in order to get a similar compiler. Once a compiler has been chosen, you can build the MEX-files. Change to the directory that contains the *.c files and type the command (in the MATLAB Command Window) to build the MEX-function

 mex functionName.c

where functionName is the name of the function/file. You will either observe errors or see that it built successfully

 Building with 'Xcode with Clang'.
 MEX completed successfully.

In your folder, there will now be a file similar to functionName.mexmaci64.

Repeat the above for each C-file.

Once completed, you can call each MEX-function from within the MATLAB code as if it were a MATLAB function

 % call functionName to do something
 Z = functionName(A,B);

so long as you provide inputs (and assign outputs) as directed by the function signature.

Try the above and see what happens!

MATLAB: Am I unable to build the mexGPUExample.cu example in MATLAB R2014b on Linux

At the top of this build output we see the lines:

-> mexopts.sh sourced from directory (DIR = $PREF_DIR) 
FILE = /home/myuser/.matlab/R2014b/mexopts.sh

This is not what we would expect to see when building for CUDA on MATLAB R2014b. mexopts.sh is related to building MEX files on MATLAB releases before release R2014a. If you still have a copy of mexopts.sh in your preferences directory or current working directory this still will be used however. (MATLAB may have copied it from a previous MATLAB installation if you had manually modified mexopts.sh).

To resolve the issue delete this custom mexopts.sh from your preferences directory.

Best Answer

Related Solutions

MATLAB: Use mex files in matlab for MAC

MATLAB: Am I unable to build the mexGPUExample.cu example in MATLAB R2014b on Linux

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