CPU_FLAGS_X86: compatibility

[Maitreya]

Tried looking trough old post and some documentation.

But it isn't clear to me what it's exact outcome is.

Are (use)flags in here supported by the binary running somewhere if the cpu supports the featureset?

or

Does it influence the running capability of the binary as cflags would?

[eccerr0r]

CPU_FLAGS_X86 end up becoming USE flags, which trigger individual ebuild packages to add whatever is needed.
If the particular package does not check USE flags for CPU optimizations, then it will thus ignore CPU_FLAGS_X86.

This is a bit different than CFLAGS where packages are forced to use them if they are not overridden.
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Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?

[Maitreya]

Ah thank you!

So for building for multiple processors I make CPU_FLAGS_X86 a superset and CFLAGS a subset