linux-kernel - Re: 3.6-rc1: twl4030 don't compile :(

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Date:	Fri, 03 Aug 2012 01:12:10 -0400
From:	Chris Ball <cjb@...top.org>
To:	"werner" <w.landgraf@...ru>
Cc:	linux-kernel@...r.kernel.org, NeilBrown <neilb@...e.de>
Subject: Re: 3.6-rc1:     twl4030  don't compile   :(

Hi,

On Fri, Aug 03 2012, werner wrote:
>   CC      drivers/power/twl4030_charger.o
> drivers/power/twl4030_charger.c:248:12: error: invalid suffix "b1100"
> on integer constant

drivers/power/twl4030_charger.c:
#define TWL4030_BBSEL_3V0       0b0100
#define TWL4030_BBSEL_3V1       0b1000
#define TWL4030_BBSEL_3V2       0b1100

Werner, your gcc version is too old to support the 0b-prefixed binary
constant syntax.  It was introduced in gcc-4.3.  The kernel compiles
fine here, on gcc-4.7.

Neil Brown added this use of the 0b prefix in 210d4bc8a3128e3e61ac3b
("twl4030_charger: Add backup-battery charging").  Neil, I don't think
we can use this syntax yet -- Documentation/Changes says that we still
support from gcc-3.2 onwards.

Thanks,

- Chris.
-- 
Chris Ball   <cjb@...top.org>   <http://printf.net/>
One Laptop Per Child
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