Can't find mex compiler in MATLABr2015a with Xcode 8.1?

I have installed Xcode latest version(8.1) on my MAC (El Capitan 10.11.5) but when I tried to build MEX file in MATLAB 2015a I got the following error:

error using mex No supported compiler or SDK was found. For options, visit http://www.mathworks.com/support/compilers/R2015a/maci64.html.

I have tried several suggested solutions on the forum but no avail. Any suggestions?

Answer 1

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/243868-mex-can-t-find-compiler-after-xcode-7-update-r2015b#comment_407066