i have read Build Rsync for Android ,and to do as @Ben Challenor methods. i do it :
Compile with the cross compiler, using static linking:
./configure --host=arm-linux-gnueabi CFLAGS="-static"
make
but i donot know which code i need to put it to the android.the lib folder of the rsync_3.1.0
or the .so file of the lib rsync_3.1.0 ,or the all files of the rsync_3.1.0
only put the rsync file to the system/xbin all is ok