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 21:51:26 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	David Sharp <dhsharp@...gle.com>
Cc:	Darren Hart <dvhart@...ux.intel.com>, linux-kernel@...r.kernel.org,
	mrubin@...gle.com
Subject: Re: [PATCH trace-cmd 3/3] Revert "trace-cmd: Use conditional
 assignment of CC and AR"

On Wed, 2011-03-09 at 18:27 -0800, David Sharp wrote:
> On Wed, Mar 9, 2011 at 5:58 PM, Darren Hart <dvhart@...ux.intel.com> wrote:

> > dvhart@...bt:templates$ cat Makefile
> > ifdef CROSS_COMPILE
> > CC = $(CROSS_COMPILE)gcc
> > AR = $(CROSS_COMPILE)ar
> > endif
> >
> > all:
> >        echo "CC: $(CC)"
> >
> > dvhart@...bt:templates$ make -s
> > CC: cc
> >
> > dvhart@...bt:templates$ CC=gcc-4.5.1 make -s
> > CC: gcc-4.5.1
> >
> > dvhart@...bt:templates$ CROSS_COMPILE=my-cross- make -s
> > CC: my-cross-gcc
> >
> >
> > Seems to meet everyone's needs without changing any tools/scripts/etc that
> > have used trace-cmd before or after the CC ?= wreckage.
> 
> It's a little odd that the default CC is "cc" unless you supply
> CROSS_COMPILE, then it's "gcc". I'd probably be okay with this, but I
> would think it's weird.
> 
> I don't know the answers, but if we take the kernel Makefile as a
> template, then setting CC doesn't work.
> 

I really don't care much for this either. But I'm trying to make it work
for everyone. Honestly, I think the BUILD_CC version is the cleanest,
but I understand that this will add a burden onto Darren to fix his
tools to handle it, whereas, I would like to avoid that.

I'll play with some other make tricks and see if I can come up with a
better solution.

-- Steve


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