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Re: Self baked kernel panics

>> COPTS+=-mcpu=21164a (same as -O0 -mcpu=21164a)
> regardless of the possible kernel bug, that sounds wrong.  Why does
> _appending_ to a variable make it lose its default value (which is
> -O2)?

One possible answer - I don't know whether it's the right one in this
case - is that

VAR += foo
VAR ?= bar

is (provided VAR is not previously set) equivalent to

VAR = foo
VAR ?= bar

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