mean30 terminates with illegal instruction (signal 4 - error 132) on virtualized Linux environment about cuckoo HOT 8 CLOSED

It may be for not up-to-date hence buggy compiler on Travis maybe?
Relevant lines from Travis log:

Runtime kernel version: 4.9.6-040906-generic

Description:	Ubuntu 14.04.5 LTS

GNU bash, version 4.3.11(1)-release (x86_64-pc-linux-gnu)

gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4

docker version
Client:
 Version:      17.03.1-ce
 API version:  1.27
 Go version:   go1.7.5
 Git commit:   c6d412e
 Built:        Mon Mar 27 16:58:30 2017
 OS/Arch:      linux/amd64

clang version 3.9.0 (tags/RELEASE_390/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix

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This ticket is specific to mean30 - not lean30 that seems more stable.

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By default, mean miner runs needs a CPU that supports AVX2 instructions to run on, and a lot of slightly older processors don't support that instruction set. Building in that environment without the -mavx2 flag, as well as -DXBITS=0 and -DNSIPHASH=1 should allow it to run.

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I agree in theory, but I've found I needed to include the XBITS flag as well or it wouldn't compile. Try without first.

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Ah, of course, sorry.

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Outcome distilled in PR #33 (merged).

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