MEX doesn't look for GFORTRAN, although I added it to the path

I want to setup MEX with GFORTRAN on MATLAB. I know that you're supposed to add it to the environment variable by doing this:

setenv('PATH', [getenv('PATH') ':/usr/local/bin/'])

And I did, getenv('PATH') gives me:

'/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin'.

So I used -v and see what's going on. It turns out MATLAB is not looking for GFORTRAN at all:

Verbose mode is on.
... Looking for compiler 'Intel Fortran Composer XE' ...
... Looking for environment variable 'IFORT_COMPILER17' ...No.
... Looking for environment variable 'IFORT_COMPILER16' ...No.
... Looking for environment variable 'IFORT_COMPILER15' ...No.
... Looking for environment variable 'IFORT_COMPILER14' ...No.
... Looking for environment variable 'IFORT_COMPILER13' ...No.
... Executing command 'which ifort' ...No.
Did not find installed compiler 'Intel Fortran Composer XE'.

How can I make MATLAB search through the PATH environment?

I have a MAC and I use MATLAB 2017a. How can I make MATLAB look for GFORTRAN instead of Intel Fortran Composer XE?

Answer 1

[Walter Roberson]

gfortran is not supported for Mac in R2017a. R2015a was the last release with gfortran support for Mac.

[jh2011]

What's the difference between gfortran and Intel Fortran Composer XE?

[Walter Roberson]

Ummm, nearly everything?

If you really want to, you could take a backup copy of

/Applications/MATLAB_R2017a.app/bin/maci64/mexopts/intel_fortran.xml

and then hack the file to pieces, tweaking all of the environment variables named and all of the library names and all of the directory names...