netdev - Re: pull request: wireless-2.6 2008-02-27

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Message-ID: <20080301130133.GA14250@uranus.ravnborg.org>
Date:	Sat, 1 Mar 2008 14:01:33 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	"John W. Linville" <linville@...driver.com>
Cc:	Johannes Berg <johannes@...solutions.net>,
	Michael Buesch <mb@...sch.de>,
	David Miller <davem@...emloft.net>,
	gordonfarquharson@...il.com, netdev@...r.kernel.org,
	linux-wireless@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: pull request: wireless-2.6 2008-02-27

On Fri, Feb 29, 2008 at 04:42:40PM -0500, John W. Linville wrote:
> On Fri, Feb 29, 2008 at 02:10:58PM -0500, John W. Linville wrote:
> > On Fri, Feb 29, 2008 at 05:34:13PM +0100, Johannes Berg wrote:
> > > 
> > > On Fri, 2008-02-29 at 11:26 -0500, John W. Linville wrote:
> > > > On Fri, Feb 29, 2008 at 01:16:59PM +0100, Michael Buesch wrote:
> > > > 
> > > > > I'm wondering if we can't simply pass a commandline parameter to file2alias
> > > > > that tells it whether we are crosscompiling. It should simply omit the sanity check
> > > > 
> > > > Sounds reasonable to me.
> > > 
> > > In fact, file2alias shouldn't need a command line argument ...
> > > 
> > > > > in that case. Is there any easy and reliable way to find out whether we
> > > > > are crosscompiling from a makefile (I don't know the makefile core that much)?
> > > > 
> > > > Non-empty CROSS_COMPILE definition?
> > > 
> > > ... it can just check whether CROSS_COMPILE is set in its environment.
> > > No?
> > 
> > Not a bad idea...something like this?
> 
> That version didn't work -- it seems CROSS_COMPILE is always set,
> even if it is empty.
> 
> This version seems to work, but it is a bit chatty when CROSS_COMPILE
> is set and you build lots of modules...thoughts?

We cannot use CROSS_COMPILE to detect a cross build as CROSS_COMPILE
is used used to select different gcc versions, cccache etc.
The only relaiably way to detect a cross build is to check
is ARCH != modified uname -m arch.
So this check would have to be done in the top-level Makefile.

And that for shaving 6 bytes of a structure..

	Sam
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