RFA/RFC: Enable both gold and ld in a single toolchain

[H.J. Lu]

On Wed, Mar 17, 2010 at 12:00 AM, Nick Clifton <nickc@redhat.com> wrote:
> Hi H.J.
>
>>> exec-tool will still need to be updated.  It is still invoked (as
>>> "collect-ld") and it still needs to be able to understand the
>>> -use-gold/-use-ld options.
>
>> Aren't they passed to collect2 directly with "${1+"$@"}"?
>
> No it works the other way around:
>
>  gcc invokes collect2.
>  collect2 invokes collect-ld.  (In a built but not installed toolchain)
>  collect-ld invokes ld-new.
>
> Thus the decision as to which linker executable to use is made by the
> collect-ld script, not the collect2 binary.
>
> In the case of installed toolchain the sequence is different.  Here gcc
> invokes collect2 which then invokes the linker directly.  Hence collect2
> must also know about the -use-gold -use-ld switches.
>

I see. Thanks.


-- 
H.J.