To compile for x86, this is the pretty same thing than usual:

./configure; make 

To compile for Zaurus, you have to do this:

cp src/gen6502_arm.c src/gen6502.c
Add zaurus_blit.S to the variable zfceu_SOURCES of src/Makefile.am
And compile with the following command:
CC=arm-linux-gcc ./configure --host=arm-linux; make

Don't edit the src/gen6502.c file, it's generated from the src/*def files,
if you need information about that process please contact the zfceu
mailing list.

For any feeback, please send emails to the zfceu mailing list to:
zfceu@neo-rousseaux.org

If you want to do a bugreport please use the bugreporting system at:
http://www.neo-rousseaux.org/phpbt
