popcnt issue on CentOS 7.2 about nativejit

[MikeHopcroft]

Hi - my apologies for the slow reply - did you figure this out?

[pengxu7]

No, I haven't played with NativeJIT after this issue. I wanted to try to use NativeJIT in production code, but this makes me hesitant. Does NativeJIT support Linux, especially CentOS/RHEL? Is it being actively maintained?

Thanks.

[musicinmybrain]

NativeJIT uses SSE4.2 intrinsics for POPCNT/LZCNT. You have to add -msse4.2 to your build flags for these to be available, which obviously restricts the result to machines with those extensions. That’s what the “target specific option mismatch” is about. To be fully portable you would enable SSE4.2 in just the relevant portion of your code that uses NativeJIT, and do runtime CPU feature detection before calling anything that uses that portion.

(But, no, it seems this project isn’t actively maintained anymore.)