[U-Boot] [PATCH v2] config.mk: use memoization in cc-option macro to speed up compilation

[Wolfgang Denk]

Dear Daniel Schwierzeck,

In message <CACUy__XY1873+dT-s=-GyPeBq5hnYsmYwWt-gxEXiwY97EcGdg at mail.gmail.com> you wrote:
> 
> Should we change it? is the semantic still the same?

I'm not sure. At first reading it doesn't look really the same to me.

Best regards,

Wolfgang Denk

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