Hi Gilles,

I was able to compile and run the pi benchmark program on Knoppix 6.7.1 DVD after I had installed gcc-4.6-multilib and some other packages of the Debian unstable branch (sid).

Here is a short overview of my approach.

0. apt-get update

1. download new libc6, libc6-dev (unstable): apt-get -d -t sid install libc6 libc6-dev

2. switch to runlevel 2 to avoid complications with running applications: init 2

3. upgrade libc6:
chroot /UNIONFS/
apt-get -t sid install libc6 libc6-dev
exit

4. switch back to runlevel 5: init 5

5. apt-get -t sid --reinstall install libc6-dev-amd64 gcc-4.6-multilib lib64gcc1

6. download and extract pi_quick_start.tar.gz

7. change to the new directory pi_quick_start

8. edit the file start.sh: find the two lines beginning with "cc" and replace "cc" with "gcc -m64"

9. set environment variable CFLAGS: export CFLAGS=-m64

10. run the script: ./start.sh


Best Regards