[llvm-dev] difference between --target, -mcpu, -march

[Rail Shafigulin via llvm-dev]

I'm confused about the clang --target, -mcpu, -march

Can someone give a clear explanation on what is the difference between them?

Originally I thought need to specify -mcpu (which I assume means CPU) and
-march but then I can't figure out how --target fits into the picture.
Sometimes it tells me that -march or -mcpu options is not used. I would
really appreciate any help on this.

-- 
Rail Shafigulin
Software Engineer
Esencia Technologies
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