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Setup MEX compiler for R2014a for Linux

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Nathan
Nathan 2014-6-23
评论： Jay Stanley 2018-3-16
Ubuntu 14.04 comes with GCC 4.8. Matlab 2014a only supports up to GCC 4.7. When I use 2013a I can set the mexopts.sh script to use GCC-4.7 by doing the following
1) In matlab, type mex -setup and press 1 to copy mexopts.sh to ~/.matlab/R2013b/mexopts.sh
2) From the terminal, edit the file ~/.matlab/R2013b/mexopts.sh so that CC=’gcc’ change to –> CC=’gcc-4.7′ CCX=’g++’ change to –> CCX=’g++-4.7′
In 2014a the mexopts.sh file does not exist anymore. When I type mex -setup I get the following error:
>> mex -setup C++
Error using mex
No supported compiler or SDK was found. For options, visit http://www.mathworks.com/support/compilers/R2014a/glnxa64.
I know GCC 4.7 is installed because it works for R2013b but how do I set compiler in 2014a?
  1 个评论
Awais Ashfaq
Awais Ashfaq 2016-2-22
Hi, I have a similar problem. Where should I copy the mexopts.sh? I can't find any folder MATLABversion? Cheers

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采纳的回答

Mukul Rao
Mukul Rao 2014-7-14
Hi,
Beginning version R2014a, MATLAB automatically configures the mex pseudo compiler to use a supported compiler (such as gcc 4.7x ) on your machine. This leaves the use of the command “mex –setup” redundant unless you would like to use a supported compiler that is different from the default selection, or force MATLAB to use an unsupported compiler.
Did you try mexing a simple mex file like “timestwo.c” to check if the “mex file_name.x” command works on R2014a?
>> copyfile(fullfile(matlabroot,'extern','examples','refbook',...
'timestwo.c'), '.', 'f');
>> mex timestwo.c
Make sure you have write permission in your current working directory
  6 个评论
显示 4更早的评论
Awais Ashfaq
Awais Ashfaq 2016-2-22
Hi, I have a similar problem. Where should I copy the mexopts.sh? I can't find any folder MATLABversion? Cheers
wided hechkel
wided hechkel 2017-2-11
Hello,
Should i delete the mexopts.sh from MatlabRoot"/bin/mexopts.sh after changing and copying it to ~/.matlab/"MatlabVersion" ?

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更多回答（3 个）

JIAWEI WU
JIAWEI WU 2015-1-26
Thanks Sergey, I copied the file mexopts.h as you said, it works here. it cost me one night to fix it, until now, finally, it has been solved. you are so great!
Dave
Dave 2017-4-14
编辑：Dave 2017-4-16
My solution for R2017a on Ubuntu 16.04.
First install the version of GCC Matlab expects:
sudo apt-get install gcc-4.9
Then edit the configuration file to point to this:
cd ~/.matlab/R2017a
sudo chmod 777 mex_C_glnxa64.xml
gedit mex_C_glnxa64.xml
Within that xml file, replace:
Location="$gcc"
with
Location="/usr/bin/gcc-4.9"
Save file and Matlab should no longer produce wrong version warnings.
wided hechkel
wided hechkel 2017-2-11
Hello,
Should i delete the mexopts.sh from MatlabRoot"/bin/mexopts.sh after changing and copying it to ~/.matlab/"MatlabVersion" ?
  1 个评论
jie Chang
jie Chang 2017-3-12
Hello,could you tell me where the direction ~/.matlab/“MatlabVersion”is? thank you.

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