Re: [PATCH] kbuild: fix if_change and friends to consider argument order

From: Masahiro Yamada
Date: Thu May 05 2016 - 10:50:24 EST

2016-05-05 17:08 GMT+09:00 Woodhouse, David <david.woodhouse@xxxxxxxxx>:
> On Thu, 2016-05-05 at 16:45 +0900, Masahiro Yamada wrote:
>> This commit fixes arg-check to compare two strings as a whole.
>> $(strip ...) is important because we want to ignore the difference
>> that comes from white-spaces.
> Do we?
> I can construct a hypothetical situation in which whitespace differs
> and we *do* want it to make a difference (for example I used to sign
> with a key called 'My Signing Key.pem' and now I've changed to use
> 'My Signing Key.pem'. (OK, it's a *stupid* example but still...)
> I couldn't come up with the converse â where whitespace does change for
> some reason, but we really don't want to rebuild.
> Should we err on the side of caution, and let whitespace changes
> trigger a rebuild?
> --
> David Woodhouse Open Source Technology Centre
> David.Woodhouse@xxxxxxxxx Intel Corporation

Please hold on.

I noticed some side effect on this patch.

I need to test it more carefully.

Best Regards
Masahiro Yamada