produces:
ffa_ch11_tuning_and_api.kv (ffa) ffa/libffa/fz_mul.adb
consumes:
ch11_unrolled_asm_comba (ffa) ffa/libffa/fz_mul.adb
ffa_ch12_karatsuba_redux.kv (ffa) ffa/libffa/fz_mul.adb