To do cross compile of 32/64 bit program on one machine.(which installed
64-bit zsh)
I use ArchLinux x86_64 as host machine.
And a arch32 chroot environment for 32-bit compiling(which installed 32-bit
zsh).

One problem is the PS1 of zsh.
It will display the same on both environment.
I'm wonder could I show different prompt inside the chroot environemnt?

If zsh's prompt variable can deal this?