PATH=/emul/ia32-linux/bin:$PATH perl -de 0

Loading DB routines from perl5db.pl version 1.3
Editor support available.

Enter h or `h h' for help, or `man perldebug' for more help.

main::(-e:1):	0

  DB<1> use POSIX

  DB<2> x POSIX::uname
0  'Linux'
1  'frodo'
2  '2.6.16.60-0.60.1-default'
3  '#1 SMP Tue Mar 9 09:44:12 UTC 2010'
4  'ia64'