Builds fail on AMD without flags about lokinet HOT 6 CLOSED

confirming that #138 fixes this for me

from lokinet.

from the wikipedia page on FMA3/FMA4:

Zen: WikiChip's testing shows FMA4 still appears to work (under the conditions of the tests) despite not being officially supported and not even reported by CPUID. 
This has also been confirmed by Agner.[5] But other tests gave wrong results.[6] 
AMD Official Web Site FMA4 Support Note ZEN CPUs = AMD ThreadRipper 1900x, R7 Pro 1800, 1700, R5 Pro 1600, 1500, R3 Pro 1300, 1200, R3 2200G, R5 2400G.[7][8][9]

GCC and clang go on what CPUID returns for FPU feature flags

from lokinet.

We should work out how to do CPU detection to rectify this bug its really annoying :(

from lokinet.

@KeeJef you mean AMD_RYZEN_HACK makes it compile for you?

I'd like to keep the issue open until we can actually get a build-time test, if that's possible.

from lokinet.

Yes AMD_RYZEN_HACK makes it compile without needing the above flags

from lokinet.

ye

that's because it fills in those flags for you -march=native -mavx -mavx2 -mfma -mfpmath=sse (yes that last one is there because multilib....there's probably 6 people that are going to throw the -m32 switch in there)

from lokinet.