Strange Coder error, compiler configured okay but detection failed

>> mex -setup
MEX configured to use 'Xcode with Clang' for C language compilation.

To choose a different language, select one from the following:
 mex -setup C++ 
 mex -setup FORTRAN
>> genc
------------------------------------------------------------------------
Error Report: Command "clangSetupFcn" threw an error: Unable to detect supported compiler. Install a supported compiler. For more information, see Supported and Compatible Compilers.

------------------------------------------------------------------------
Build error: C compiler produced errors. See the Build Log for further details.
More information
Code generation failed: View Error Report

Error using codegen


Error in genc (line 13)
codegen -config cfg ...
 
>> 

Answer 1

[David Fink]

This error can occur if your version of Xcode is not supported, or Xcode is not fully installed or set up.

To check which versions of Xcode are supported, see:

Current release of MATLAB:

https://www.mathworks.com/support/requirements/supported-compilers-mac.html

Previous releases of MATLAB:

https://www.mathworks.com/support/requirements/previous-releases.html

If your version of Xcode is supported for your release of MATLAB and you still see this error, contact MathWorks Technical Support.