[patch] Implement unique sections with an unique ID

[Rafael Espíndola]

I haven't been able to actually reduce the number of places.

I did cleanup the overoads a bit in 234100.

On 2 April 2015 at 19:54, Eric Christopher <echristo at gmail.com> wrote:
> Looks much better.  Default argument for unique number to avoid having to
> update a few places?
>
> -eric
>
> On Mon, Mar 30, 2015 at 8:27 AM Rafael Espíndola
> <rafael.espindola at gmail.com> wrote:
>>
>> The attached patch changes the unique section implementation to use an
>> unique id.
>>
>> This allows the compiler/assembly programmer to switch back to a
>> section. This in turn fixes the bootstrap failure on powerpc (tested
>> on gcc110) without changing the ppc codegen at all.
>>
>> This time, also document the extension.
>>
>> Cheers,
>> Rafael