I got the [Maemo](http://maemo.org) [SDK](http://maemo.org/development/sdks/maemo-4-1-diablo-sdk/)
installed on Fedora 9. The instructions are pretty complete.
First, Scratchbox needs the compat VDSO mode enabled. This is done by
`echo 0 > /proc/sys/vm/vdso_enabled`. Also, Qemu requires
`mmap_min_addr` set to 4096. These can be set permanently by adding
the following lines to `/etc/sysctl.conf`.
# scratchbox support
vm.vdso_enabled = 0
vm.mmap_min_addr = 4096
On my desktop, which is x86_64, compat VDSO can only be set with the
`vdso32=0` kernel command-line option. Also, the scratchbox installer
script checks for i386 architecture. It needs to faked out like this:
`setarch i386 ./maemo-scratchbox-install_4.1.sh`.