Call .c function in working directory

Hello!

I am in way over my head trying to call a .c function in a running script.

The code is about 20 years old now and I am updating it to run on the current 2021 platform on a Mac.

Basically in this working folder I have 2 files "code.c" and "code.dll" and I amd trying to use the them in the context

z=code(x,y);

at the top of the code.c is a header:

#include <math.h>
#include "mex.h"

Ive tried simply calling the function like the following after installing code compiler:

mex code.c

Which then pops the error message of needing a compiler. I really dont want to search to find one that works with a Mac at a low storage space.

Is there any way around this?

[Walter Roberson]

Mac does not use .dll files. Mac uses .dylib (dynamic link library) and .a (static link library) files; also dynamically loadable bundles might be .so (see https://docstore.mik.ua/orelly/unix3/mac/ch05_03.htm )

Answer 1

[Jan]

Please post a copy of the error message, not a rough paraphrasation.

"needing a compiler" seems to mean, that you did not install a compiler, which is recognized by Matlab. I guess that " current 2021 platform on a Mac" means Matlab R2021a, but what does "Mac at a low storage space" exactly mean? You need XCode 11 or 12, see: https://www.mathworks.com/support/requirements/supported-compilers.html

[Walter Roberson]

It is likely that you could also get gcc working, with enough effort; it is not supported by MATLAB on Mac though.

[Evan Patton]

Jan, Walter,

thank you both for your help! I ended up downloading xcoder for my mac (I freed up some storage space and was able to just barely fit it in). I am still getting this error message.

loadlibrary('code.dll','code.c')

gives the error message:

Error using loadlibrary
Supported compiler not found. For options, visit https://www.mathworks.com/support/compilers.

And then another command I tried:

mex code.c

gave the same exact error

Do I need to somehow initialize matlab to automatically recognize xcoder? or is there something else needed in the command.

Thank you so muh

[Evan Patton]

update: all I had to do was open xcoder..... I am sorry if there was any confusion