C code generation symbols not found linker error

I generated C code for my matlab functions and created a package by following the instructions at Package Code for Other Development Environments.

I had configured code generation for example main files.

After everything was complete, I tried to compile my code using

clang main.c -o out

However, I get the error:

Undefined symbols for architecture x86_64:
  "_cg_imadjust", referenced from:
      _main_cg_imadjust in main-b5a3fb.o
  "_cg_imadjust_terminate", referenced from:
      _main in main-b5a3fb.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I have tried looking up other solutions online but they mostly talk about mex file generation whereas I am trying to compile C code. Other solutions talked about having a main.c file but I already have one. I am confused on what the issue is.

I have attached my package zip file (that includes the main.c and main.h files). I am using Mac 10.15.6.

Thank you.

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/images/ref/imadjust.html#bvm6s9t-1

imadjust generates code that depends upon a shared library that you need to link in

https://www.mathworks.com/help/images/code-generation-for-image-processing.html#buh1ksc-1

Answer 2

[Ryan Livingston]

In your ZIP file you'll notice files cg_imadjust.c, cg_imadjust_interminate.c that also need to be compiled and linked. main.c calls functions implemented in those files causing this error.

Try something like

clang *.c *.dylib

to compile and link in all of the C files and shared libraries to avoid those and other errors.