foo.c

int main() {
  const int x = 10; 
  return x*2;
}

foo.s

	.file	"foo.c"
	.text
.globl main
	.type	main, @function
main:
	pushl	%ebp
	movl	%esp, %ebp
	subl	$16, %esp
	movl	$10, -4(%ebp)
	movl	-4(%ebp), %eax
	addl	%eax, %eax
	leave
	ret
	.size	main, .-main
	.ident	"GCC: (Ubuntu 4.4.3-4ubuntu5) 4.4.3"
	.section	.note.GNU-stack,"",@progbits