nasm and gdb problem with nasm version 0.99

It looks like this was fixed in nasm version 2.01, but if you are running version 0.99 you may find that you no longer have debugging information for gdb.

The fix is easy, replace ``-f elf`` with ``-f elf32`` or ``-f elf64`` depending on your environment.

— Greg Priest-Dorman 2008/11/14 10:27