zstd-1.4.5 fails to compile on my CentOS 6.10 boxes. Error messages:
/tmp/ccja65az.s: Assembler messages:
/tmp/ccja65az.s:99: Error: no such instruction: `shlx %edi,%eax,%eax'
/tmp/ccja65az.s:115: Error: no such instruction: `sarx %rax,%rdx,%rdx'
/tmp/ccja65az.s:133: Error: no such instruction...