NASM and DDD

[Gary Burt]

(I searched the archives and found nothing on this topic.)

I would like to use DDD with assembly language programs.  I teach 
assembly and will have to change from DOS/MASM to Linux with NASM.
(I did not make those decisions, but there are advantages to
our Computer Science program by doing this, so the pain of transition is 
worth it.

I have tried to assemble and link using the following commands:

    nasm -f elf try1.asm
    gcc -s -o try1 try1.o

But when I try:

     ddd try1

I get nothing as a program.

What did I do wrong?

Thanks for any help.

Gary Burt