GLM_ARCH_SSE4 is not defined.

[mackron]

For some reason it appears the GLM_ARCH_SSE4 define is left out in setup.hpp. Not a huge problem, except simd_quat has an SSE4 optimized path which of causes -Wundef warnings.

I can remove that optimized path from simd_quat, but using GLM for platform detection for my own code is pretty handy - it'd be nice to have GLM_ARCH_SSE4 available too.

[Groovounet]

Ok, I can fix it.

I guess the reasoning here was that SSE, SSE2, SSE3 were clean set of cross platform instruction sets. SSSE3 SSE4* not so much.

So in GLM the idea was to just ignore SSE after SSE3 and check for AVX that is also a clean cross platform instruction set that have all the SSE4 stuff.

That doesn't prevent introducing SSE4 again if that's useful.

[Groovounet]

This is fixed in GLM 0.9.5 branch for GLM 0.9.5.4 release.

Thanks for contributing,
Christophe