mac Matlab 2018b with xcode10 installed still No supported compiler was found

Warning: Xcode is installed, but its license has not been accepted.
Run Xcode and accept its license agreement.
 
> In make (line 13) 
Error: path_to_libsvm/libsvm-3.23/matlab/make.m failed (line 13)
No supported compiler was found. For options, visit https://www.mathworks.com/support/compilers.

I would like to compile some C codes with mex. However, even with brand new matlab 2018b and xcode10(for now) installed on my mac could not compile these files.

Yeah, I know the warning about Xcode license issue and that's strange since I DID aceept these license by typing

sudo xcodebuild -license

in command line and accepting it.

So anyone with same experience or some suggestions ? I would be very appreciated if you do ! 0.0

[Ran Chen]

Please check the following link, which might be helpful

https://apple.stackexchange.com/questions/175069/how-to-accept-xcode-license

[Cristian Czegledi]

Hi, I have the same problem. I tried various things, including the one suggested by Ran Chen, but nothing worked. Did you solve it somehow?

[xie ling]

Oh still nope 0.0 sry about that

Answer 1

[Cristian Czegledi]

Hi, in the meantime I found a solution described here

http://gwang-cv.github.io/2018/10/31/Matlab%20Mex%20Warning/

Open the following 2 files

/Applications/MATLAB_Rxxxxx.app/bin/maci64/mexopts/clang_maci64.xml

/Applications/MATLAB_Rxxxxx.app/bin/maci64/mexopts/clang++_maci64.xml

where you have to replace xxxxx with your Matlab version (I have R2018b),

and add a new line with "<cmdReturns name="echo 4.3.3"/>" before the line with

"<cmdReturns name="defaults read com.apple.dt.Xcode IDEXcodeVersionForAgreedToGMLicense"/>"

To be honest I don't understand what's going on, but fortunately it works.

Hope it works for you.

Cristian

[Guglielmo Genovese]

Thank you! That was really useful.

However, in the two files I changed the name "com.apple.dt.Xcode IDEXcodeVersionForAgreedToGMLicense" with "com.apple.dt.Xcode IDEXcodeVersionForAgreedToBetaLicense". You can check the right name for your agreed license by opening that file /Library/Preferences/com.apple.dt.Xcode.plist

Guglielmo

[Parvin Zarei]

Thanks, It was very helpful.

Answer 2

[xie ling]

I still could not compile with mex in matlab with the same environment as in titile. But I found alternative ways to solve this problem.

If you could not use mex in Matlab properly even after

sudo xcodebuild -license
sudo xcodebuild -license accept

Maybe you could try using mex in Octave instead, which could be regarded as command line tool of Matlab.

It didn't generate any errors or warning in Octave prompt when

mex -setup