crc.c:35: bits out of range ?

[dcb314]

crc.c:35:32: warning: result of '4823603603198064275l << 63' requires 127 bits to represent, but 'long int' only has 64 bits [-Wshift-overflow=]

uint64_t remainder_xor = POLY << 63;

[sadmac7000]

That should be harmless. Not sure when the compiler started complaining about that. The overflow is intentional there.