[U-Boot] [U-Boot,1/2] kbuild: Add clang detection

[Tom Rini]

On Tue, Jan 19, 2016 at 08:39:01PM -0500, Tom Rini wrote:

> Adapted from:
> 
> >From 5631d9c429857194bd55d7bcd8fa5bdd1a9899a3 Mon Sep 17 00:00:00 2001
> From: Michal Marek <mmarek at suse.com>
> Date: Wed, 19 Aug 2015 17:36:41 +0200
> Subject: [PATCH 1/1] kbuild: Fix clang detection
> 
> We cannot detect clang before including the arch Makefile, because that
> can set the default cross compiler. We also cannot detect clang after
> including the arch Makefile, because powerpc wants to know about clang.
> Solve this by using an deferred variable. This costs us a few shell
> invocations, but this is only a constant number.
> 
> Reported-by: Behan Webster <behanw at converseincode.com>
> Reported-by: Anton Blanchard <anton at samba.org>
> Signed-off-by: Michal Marek <mmarek at suse.com>
> 
> in the Linux kernel.
> 
> This will allow us to make better decisions about when to run tests
> later on for gcc features.
> 
> Signed-off-by: Tom Rini <trini at konsulko.com>

Applied to u-boot/master, thanks!

-- 
Tom
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