Can't compile MEX-files under OS X Lion... even with patch!

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louise
louise 2011-12-7
Hello!
Trying to compile the MEX example as shown here:
http://www.mathworks.co.uk/support/tech-notes/1600/1605.html#testing
Installed the patch as shown here:
http://www.mathworks.co.uk/support/solutions/en/data/1-FR6LXJ/index.html
But I get this error:
>> mex yprime.c
/var/folders/ks/xd_bvtl16fx5m10g8w6t1f9h0000gp/T//cc5jjKJx.s:unknown:FATAL:can't create output file: yprime.o
mex: compile of ' "yprime.c"' failed.
I can't find any support anywhere in the docs. Can anyone help?
Thanks!
Louise :)

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采纳的回答

louise
louise 2011-12-8
SOLVED.
You need to run Matlab as root.
This is done in OS X by cd'ing to the bin directory inside the Matlab app and running the matlab executable in there with sudo.
You can write your own script to automate this.

更多回答（2 个）

Kaustubha Govind
Kaustubha Govind 2011-12-7
Try running:
mex -v yprime.c
This should give you a verbose output of the "mex" command that should give you a better idea of the issue.
Also, make sure that you have write permissions in your drive (on Windows 7, for example, MATLAB needs to be "run as administrator" to be able to write to disk).
Ken Atwell
Ken Atwell 2012-1-12
Rather than run MATLAB as root, I would encourage you first copy any MEX example file that ships with MATLAB to a folder that you can write to without being root. For example:
cd ~/Documents/MATLAB
copyfile([matlabroot '/extern/examples/refbook/timestwo.c'])
mex timestwo.c
timestwo(512)
This is probably only at issue with the examples that ship with MATLAB; presumably you keep your own source code in user-writeable folders.
You also have the option of using MEX's -o switch to control where MEX writes files.

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