Creating Command Line Args with gcc?

Question

I have the following code:

gcc test.c -o test -D ARGUMENT 2

and I want it to define ARGUMENT with a value of 2 but it says cannot find file 2 or something. How do I do this?

Answer 1

Try

-DARGUMENT=2

Answer 2

gcc test.c -o test -D ARGUMENT=2

Answer 3

You can also use gcc test.c -o test -DARGUMENT.

ARGUMENT will be defined with no value but it is still possible to check it using #ifdef and friends.