linux-kernel - Re: [PATCH 04/24] hwmon: change to new flag variable

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Date:	Mon, 27 Sep 2010 10:23:13 -0700
From:	matt mooney <mfm@...eddisk.com>
To:	Valdis.Kletnieks@...edu
Cc:	kernel-janitors@...r.kernel.org, lm-sensors@...sensors.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/24] hwmon: change to new flag variable

On 11:04 Mon 27 Sep     , Valdis.Kletnieks@...edu wrote:
> On Fri, 24 Sep 2010 12:17:14 PDT, matt mooney said:
> > Replace EXTRA_CFLAGS with ccflags-y.
> > 
> > Signed-off-by: matt mooney <mfm@...eddisk.com>
> > ---
> >  drivers/hwmon/Makefile |    4 +---
> >  1 files changed, 1 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
> > index e3c2484..764b4db 100644
> > --- a/drivers/hwmon/Makefile
> > +++ b/drivers/hwmon/Makefile
> > @@ -109,7 +109,5 @@ obj-$(CONFIG_SENSORS_W83L786NG)	+= w83l786ng.o
> >  obj-$(CONFIG_SENSORS_WM831X)	+= wm831x-hwmon.o
> >  obj-$(CONFIG_SENSORS_WM8350)	+= wm8350-hwmon.o
> >  
> > -ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y)
> > -EXTRA_CFLAGS += -DDEBUG
> > -endif
> > +ccflags-$(CONFIG_HWMON_DEBUG_CHIP) := -DDEBUG
> 
> Was this series intended as := rather than += as it seems that
> overriding the entirely of a passed-in ccflags-y may not be what
> we wanted to do.

That is exactly why I changed += to :=. ccflags-y (and the older EXTRA_CFLAGS)
is a per directory variable that only has effect on the current directory, so
there is no passing in of ccflags-y.

-mfm

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