I cannot compile with -march=core2 option. about xmr-stak-cpu HOT 8 CLOSED

core2 arch isn't supported, xmr-stak-cpu requires CPUs with AES instructions. It won't work.

X5690 does say it has AES-NI support, so not sure why it's getting "Illegal instruction".

Did you compile on the X5690 using the default CmakeList.txt ?

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My server does not have gcc-5, so I compile it on my own computer. My computer is Ubuntu 14.04 with gcc-5.4 and g++-5.4. When I use the default CMakeList.txt, everything is OK, but if I add "-march=core2" or "-march=core-avx" to CMAKE_C_FLAGS, the compiler print error msgs I showed above. I think you can reproduce this error by just adding "-march=core2" to CMAKE_C_FLAGS.

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About my server, I does support SSE2 and AES.

Part of /proc/cpuinfo:

flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt aes lahf_lm ida arat epb dts tpr_shadow vnmi flexpriority ept vpid

The output of cpuminer-multi compiled with "-march=core2" option:

** cpuminer-multi 1.1 by Tanguy Pruvot (tpruvot@github) **
BTC donation address: 1FhDPLPpw18X4srecguG3MxJYe4a1JsZnd
Modified by NiceHash (www.nicehash.com)
[2017-01-08 15:45:01] Using JSON-RPC 2.0
[2017-01-08 15:45:01] CPU Supports AES-NI: YES
[2017-01-08 15:45:01] 12 miner threads started, using 'cryptonight' algorithm.

BTW, is there any difference between AES and AES-NI ?

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See the newest changes, there is a static build option now. Use that on your gcc 5.x+ machine to compile and copy binary over. Don't change march, it should be 'westmere' (default).

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The 'westmere' works~ Thank you!
BTW, why the default option is '-march=westmere'? Is it the minimum requirement to compile this program?

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Yes, Westmere is the mininmum core that has AES. Keep in mind if you have a motherboard that was built for Nehalem you will need to update BIOS.

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Get it. Thanks a lot!

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This can be closed.

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