Hello!

I see that each poky build has a variable named TUNE_FEATURES, that looks like this
    TUNE_FEATURES = "m32 fpu-hard ppc476"

Where in poky are "m32", "fpu-hard", "ppc476" etc defined?

I'm interested in compiling a 32-bit linux kernel and root file system for an armv8 cpu.

If possible, I also want to instruct gcc to make optimizations for cortex-a53 [1] and cortex-a57 [2] so I want to find the definitions of these TUNE_FEATURES and see what other optimizations I can add to my build.

[1] http://www.arm.com/products/processors/cortex-a/cortex-a53-processor.php
[2] http://www.arm.com/products/processors/cortex-a/cortex-a57-processor.php

Thank you,
Cristian Bercaru
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