Re: [GIT PULL 1/2] Kbuild updates for v4.15

From: Linus Torvalds
Date: Fri Nov 17 2017 - 21:02:31 EST

Oh, and I forgot to ask..

On Fri, Nov 17, 2017 at 9:22 AM, Masahiro Yamada
<yamada.masahiro@xxxxxxxxxxxxx> wrote:
> One of the most remarkable improvements in this cycle is, Kbuild is
> now able to cache the result of shell commands.

I see the "limit it to 500 lines", but I don't see any real coherency.

So I take it that if you upgrade your gcc version, you may need to
blow this cache away manually?

Or is there something subtle going on that I've missed?

FWIW, I still think we should probably make the compiler versions etc
available to the configuration management rather than necessarily
cache them.