Assembly compiler for Android

I require an assembly compiler to complete the avr toolchain for android. I have zflasher, which is compatible with ispmk2, and does fuses as well. The program takes hex files, and so I require an additional program to compile the assembly code to hex format. I already have cctools downloaded, this can take a .s (.asm equivalent) file and compile, but it appears that this requires root. Before rooting I would like to be sure that there is not a preferable alternative.

Thanks,