MATLAB Answers

mex cpp file in ubuntu

28 views (last 30 days)
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: /usr/local/MATLAB/R2013a/bin/mex: 1: eval: g++: not found mex: compile of ' "triLinearVoting.cpp"' failed.

Accepted Answer

Walter Roberson
Walter Roberson on 29 Aug 2013
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.
  1 Comment
Aidin on 4 Nov 2014
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?

Sign in to comment.

More Answers (2)

Aidin on 4 Nov 2014
Edited: Aidin on 15 Nov 2014
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 file in the Matlab bin directory
sudo gedit /usr/locaL/MATLAB/R2013a/bin/
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
mex -setup
Choose the modified when prompted for the options.
The options files available for mex are:
1: /usr/local/MATLABR2013a/bin/ :
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/
Masoud Ahookhosh
Masoud Ahookhosh on 8 Aug 2016
Thanks! Perfectly worked for me!

Sign in to comment.

Shashank Prasanna
Shashank Prasanna on 29 Aug 2013
As the warning says you are using an unsupported version of the GCC compiler.
Use the support compiler:
And please take a look at the supported compiler page:
  1 Comment
Alexander on 10 Mar 2014
Can you please give a step-by-step solution? How do I point mex to the right version of GCC once it is dowloaded?

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!