mex cpp file in ubuntu

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Hi everyone

I'm trying to mex a cpp file in ubuntu using the following command.

mex triLinearVoting.cpp.

It gives me the following error:

Warning: You are using gcc version "4.6.3". The version currently supported with MEX is "4.4.x". For a list of currently supported compilers see: http://www.mathworks.com/support/compilers/current_release/ /usr/local/MATLAB/R2013a/bin/mex: 1: eval: g++: not found mex: compile of ' "triLinearVoting.cpp"' failed.

Thanks,

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Answer 1

Walter Roberson 2013-8-29

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It appears that you do not have g++ installed, and it appears that your gcc version is newer than mex has been tested with. The newer gcc is a warning that something might go wrong. But you need to install g++ to get any further.

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Aidin 2014-11-4

I did download and install the gcc-4.4, but still getting the same warning message. Is it necessary to configure the Matlab current gcc compiler to the older version? If yes how?

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Answer 2

Aidin 2014-11-4

编辑：Aidin 2014-11-15

在 MATLAB Online 中打开

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Finally, I configured Matlab to use an old gcc compiler (gcc-4.4 / Matlab 2013a / platform: Ubuntu 14.04). Here are the setp-by-step solution.

1) Install the old gcc required, here I installed gcc-4.4 and g++-4.4.

   sudo apt-get install g++.4.4
   sudo apt-get install gcc.4.4

2) Locate mexopts.sh file in the Matlab bin directory

sudo gedit /usr/locaL/MATLAB/R2013a/bin/mexopts.sh

and modify the following enteries:

   CC='gcc' -> CC='gcc-4.4'
   CC='g++' -> CC='g++-4.4'

3) Re-setup mex in Matlab using the modified mexopts.sh.

mex -setup

Choose the modified mexopts.sh when prompted for the options.

The options files available for mex are:
    1: /usr/local/MATLABR2013a/bin/mexopts.sh : 
        Template Options file for building MEX-files
    0: Exit with no changes

or directly give the path to the modified option file

mex -setup -f /usr/local/MATLABR2013a/bin/mexopts.sh