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Robert

mex can't find gcc in path

Asked by Robert
on 22 Aug 2011

Matlab-mex can't find my C compiler, even though it appears to be using the correct command. Observe:

In Matlab: >> mex foo.c /Applications/MATLAB_R2011a.app/bin/mex: line 305: gcc-4.2: command not found /Applications/MATLAB_R2011a.app/bin/mex: line 1041: gcc-4.2: command not found

In Terminal: $which gcc-4.2 /Developer/usr/bin/gcc-4.2

Any idea how to get mex to find the compiler? I'm using Mac OS Lion and 2011a.

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3 Answers

Answer by Robert
on 22 Aug 2011
 Accepted answer

I figured it out. All I had to do is run: sudo ln -s /Developer/usr/bin/gcc-4.2 /usr/bin/gcc-4.2

The problem was that /Developer/usr/bin/ is in my Terminal path, but apparently not in mex's path when looking for a compiler.

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Answer by Nathan
on 22 Apr 2012

For anyone (like me) that the above fix did not work for, download the patch discussed here: http://www.mathworks.com/support/solutions/en/data/1-FR6LXJ/

And make the modification to mexopts.sh described here: http://www.mathworks.com/matlabcentral/newsreader/view_thread/317343

Those two did the trick for me.

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Answer by Shahab
on 31 May 2012

Thank you Nathan :) it is exciting.

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