No supported compiler was found.

Upon trying to compile a file using mex, I receive the following error message:

Error using mex

No supported compiler was found.

I installed Visual Studio 2017 with support for C++ and actually

mex -setup C++

lets me choose my compiler.

Which additional diagnostics could I run in order to pin down the problem?

[Walter Roberson]

Perhaps you need to mex -setup C

[Nicolas Bourbaki]

I finally realized that Visual Studio comes without an installed compiler.

After installing Visual Studio, it is necessary to install a compiler in addition.

Therefore, this is not really a MATLAB problem, but as mentioned below, running

 mex -v -setup

proved to be very helpful in pinning down the problem.

[Walter Roberson]

Visual Studio installs one compiler by default but not another one by default. Unfortunately at the moment I do not recall which is the default. It can sometimes be necessary to go back and ask visual studio to install more components.

[Matt J]

I finally realized that Visual Studio comes without an installed compiler.

And now I am facing this same problem. How does one add a compiler to Visual Studio and configure things so that Matlab can see it?

[Nicolas Bourbaki]

You would run

mex -setup C++

This lists a couple of options in case it finds a suitable compiler like the following:

mex -setup:'C:\Program Files\MATLAB\R2020b\bin\win64\mexopts\msvcpp2015.xml' C++

[Walter Roberson]

By the way, Visual Studio does not install the C compiler by default.

Answer 1

[Matt J]

If you just run

>> mex -setup

it should present you with the compilers that Matlab can actually see. That should provide a clue.

[Walter Roberson]

mex -v -setup

can help diagonse problems.