Go to terminal and type:
$ make
This will create linker.exe, then you can test inputs:
$ ./linker "input-file"
The folder lab1samples also has scripts to check all the sample inputs. To test them:
Create yourself a directory where your outputs will be created.
$ cd lab1samples
$ ./runit.sh "your-outdir" "path-to-linker.exe"
$ ./gradeit.sh "." "your-outdir"