5a8956ea8b
These two libraries don't build for `-march=armv8-a+nofp -mabi=aapcs-soft` as a couple of uses of floating point instructions and registers have crept in. In libunwind, skip save/restore of FPU registers on targets without them. In compiler-rt, fall back to the old C implementation of __arm_sc_memset when the target doesn't have an FPU. --------- Signed-off-by: Keith Packard <keithp@keithp.com>