linux-kernel - Re: [PATCH trace-cmd 3/3] Revert "trace-cmd: Use conditional assignment of CC and AR"

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Date:	Wed, 09 Mar 2011 20:28:06 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	David Sharp <dhsharp@...gle.com>
Cc:	linux-kernel@...r.kernel.org, mrubin@...gle.com,
	Darren Hart <dvhart@...ux.intel.com>
Subject: Re: [PATCH trace-cmd 3/3] Revert "trace-cmd: Use conditional
 assignment of CC and AR"

On Wed, 2011-03-09 at 20:21 -0500, Steven Rostedt wrote:
> On Wed, 2011-03-09 at 15:58 -0800, David Sharp wrote:
> > This reverts commit 6c696cec3f264a9399241b6e648f58bc97117d49.
> > 
> > Make has default values CC and AR of 'cc' and 'ar' respectively. This means
> > that "CC ?= anything" will never have effect, because CC is always already set.
> > Because of this, 6c696cec makes setting CROSS_COMPILE from the command line or
> > environment useless.
> 
> Darren, can you verify this, as you were the one to make the original
> change. I never had to cross compile it, I always did it natively.

OK, I just proved that David is correct, with the following make file:

---
CC ?= foo
AR ?= bar
all:
	echo what is $(CC) $(AR)
---

$ make
what is cc ar


Darren, can you just give an Acked-by anyway. I hate to apply a revert
of your patch without you doing so.

Thanks,

-- Steve


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