linux-kernel - Re: ftrace scripts and make V=1

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Message-ID: <20090805080858.GA2947@merkur.ravnborg.org>
Date:	Wed, 5 Aug 2009 10:08:58 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Dave Airlie <airlied@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: ftrace scripts and make V=1

On Wed, Aug 05, 2009 at 05:23:26PM +1000, Dave Airlie wrote:
> Hey,
> 
> So I spent 3-4 hrs today (I'm stupid yes) tracking down a .o breakage by
> blaming rawhide gcc/binutils as I was using make V=1and seeing only the
> compiler chain running,
> 
> However some ftrace script was sneaking in afterwards
> and screwing up the .o without mentioning itself.
> 
> Surely V=1 should print all these shitty scripts its running?

The problem is that V=1 is already too chatty,
so people sometimes hide their stuff - as in this case.

I have for some time thought about adding some option
so we can select between:
 - less chatty than today - but print the usefull stuff
 - full debug - print almost everything

It is not that this is hard to implment.
But I never have made up my mind how to enable this.

V=1 - could be the "less chatty" mode
V=2 - could be the "full debug mode"

But we already use "V=2" to tell what caused a file to be rebuild.
This is on the other hand very seldomly used so we could get
away with a new way to request this.
So we limit V=n to select between different verbosity levels.

What do you think?

	Sam
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