xxhash
- Pass 
PREFIXandDISPATCH=1(for SSE/AVX onx86-64) to check and install targets as they are not detected in the Makefile - Alpine and OpenBSD adds 
-DXXH_FORCE_MEMORY_ACCESS=1toCFLAGS(which prefers gcc to portable memcpy) 
PREFIX and DISPATCH=1 (for SSE/AVX on x86-64) to check and install targets as they are not detected in the Makefile-DXXH_FORCE_MEMORY_ACCESS=1 to CFLAGS (which prefers gcc to portable memcpy)