## Matlab MinGW compiler setup

Matlab requires C / C++ / Fortran compilers for numerous operations such as `mex`

, `loadlibrary`

and more.
Matlab ≥ R2015b can use MinGW GNU compilers for Windows.

If Matlab doesn’t detect your MinGW compiler location, you may get an error like

Error in loadlibrary>getLoadLibraryCompilerConfiguration

or

Error using mex No supported compiler was found.

## Fix

This fix is for Windows using MinGW compilers.
Tell Matlab the MinGW compiler path via Windows environment variable `MW_MINGW_LOC`

.

Find the MinGW compiler location:

`where gcc`

in Matlab, assuming MinGW is under

`C:\mingw64\bin`

(don’t include “bin” below)`setenv('MW_MINGW64_LOC', 'c:\mingw64')`

Setup MEX permanently

`mex -setup -v mex -setup -v C++`

Note: Sadly, even through Matlab R2019a, Matlab cannot using MinGW Gfortran. Intel Fortran must be used on Windows and Mac with Matlab. On Linux, Gfortran is fine with MEX Matlab via

`mex -setup -v Fortran`

or consider using GNU Octave and Gfortran on Windows and Mac.

## Verify

Matlab MEX parameters can be discovered from in Matlab by:

```
mex.getCompilerConfigurations('C')
mex.getCompilerConfigurations('C++')
mex.getCompilerConfigurations('FORTRAN')
```