[LTO merge][0/15] Description of the final 15 patches

[Ian Lance Taylor]

Paolo Bonzini <bonzini@gnu.org> writes:

> On 09/29/2009 06:52 PM, Ian Lance Taylor wrote:
>> Paolo Bonzini<bonzini@gnu.org>  writes:
>>
>>>> So all Diego needs to do is pass --enable-shared down to libiberty
>>>> when --enable-lto/--enable-gold.  The way to do that is something like
>>>> the appended.
>>>
>>> What about just always adding --enable-shared to the host libiberty?
>>
>> That will just cause everybody to always compile libiberty twice.  Why
>> do that if we don't have to?
>
> It's just a matter of time before we need to do that, anyway (say,
> when we have plugins that we distribute by default, for example for
> mudflap). Conditionalizing on GCC could be a middle ground, or maybe
> the worst possible choice? :-)

The shared libiberty is only required for the gold plugin.  It's
possible to get benefits from LTO without the gold plugin.  Which is a
good thing, since gold only works for a few targets.

Ian