[PATCH 4/4] ARM: add jump label support

[sboyd@codeaurora.org (Stephen Boyd)]

On 11/22/11 11:42, Russell King - ARM Linux wrote:
> On Mon, Nov 21, 2011 at 08:43:49PM +0530, Rabin Vincent wrote:
>> Add the arch-specific code to support jump labels for ARM and Thumb-2.
>>
>> Note that to build succesfully it requires (what will be) GCC 4.7.0
>> because of incomplete support for the '%c' specifier in earlier
>> versions:
>>
>> 	http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48637
>>
>> Cc: Jason Baron <jbaron@redhat.com>
>> Signed-off-by: Rabin Vincent <rabin@rab.in>
> This appears to imply that with this patch, we're upping the minimum
> gcc version for successfully building kernels to 4.7.0.  That's _way_
> too early (I'm using 4.3.5 here and don't have plans to update.)

Is there a way to detect that the compiler doesn't support %c? Perhaps
we can do that in the same spirit of how we detect asm goto support for
jump labels.

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