PATCH: Support --enable-gold=both --with-linker=[bfd|gold]

[Ian Lance Taylor]

"H.J. Lu" <hjl.tools@gmail.com> writes:

> On Tue, Jan 5, 2010 at 1:35 PM, Ian Lance Taylor <iant@google.com> wrote:
>> Roland McGrath <roland@redhat.com> writes:
>>
>>>> I'm still not entirely convinced that this is the way to go.  It seems
>>>> to me that ideally one wants to be able to select the linker at
>>>> runtime.  I don't see how this patch supports that.  What am I
>>>> missing?
>>>
>>> It covers the first step by letting you run "ld.bfd" or "ld.gold" to
>>> choose.  Having the two binaries installed by those names is a good start
>>> and seems likely to be part of how any fancier plan would work, so why not
>>> start there?
>>
>> Mainly because an alternative is to install them in subdirectories
>> with the name ld.  Then gcc can run them directly using a -B option.
>> I don't know which approach is best.
>>
>
> Plugin only works with gold. So I configured my gcc with
>
> -with-plugin-ld=ld.gold
>
> If both linkers have the same name, it will be harder to
> use ld by default and use gold only for plugin.

The issue can be addressed with symlinks.

Of course, if we have a way to tell gcc the linker to use, by name, at
runtime, that will also work.

Ian