Compilation is normally encapsulated so that all of the necessary steps happen behind the scenes. Type the following C code into a file named count.c.

Question

Compilation

Compilation is normally encapsulated so that all of the necessary steps happen behind the scenes. Type the following C code into a file named count.c.

#include <stdio.h>

#include <stdlib.h>

#define TARGET 10

int main(){

int i;

for (i = 0; i < TARGET; ++i)

printf("%d\n", i);

return EXIT_SUCCESS;

}

You can compile this code all at once with the following command.

gcc -o count count.c

You can verify with ls that there are now two files: count.c containing your source code, and count, the executable program. (If you’re used to Windows where programs have a .exe extension, you’ll have to get used to the tradition in UNIX that programs do not have an extension at all.) You can run the program and see it work by entering the following.

./count

Compiling

cc -S -o count.s count.i

Note that we start from the preprocessed .i file and that the traditional extension for the assembly language output is .s. Again, have a look inside the resulting file—you are not expected to understand assembly language yet, but we will be learning a lot about it in the coming weeks.

Assembling

as -o count.o count.s

gcc -c -o count.o count.s

xxd count.o

Linking

gcc -o count count.o

The assignment

Work through the example above. submit all of the files along the way:

1. count.c
2. count.i
3. count.s
4. count.o
5. count

xxd file dumped # dump file into dumped

# now edit dumped

xxd -r dumped file # patch the changes back into the original

Answer 1

Most people have what is called an IDE (Integrated Development Environment)

It is a software package that includes, but is not limited to, the FULL SCREEN editor,

debugger, and menus for copy,paste, open, save, creating new projects and apps,

and most importantly COMPILING and RUNNING on demand, which does all of these

things for you at the click of a button.

Otherwise, you have to issue commands at the system prompt to compiler and link the code

as described in your assignment.