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Re: Update LTO plugin interface
"H.J. Lu" <hjl.tools@gmail.com> writes:
> On Thu, Dec 2, 2010 at 9:00 AM, Ian Lance Taylor <iant@google.com> wrote:
>> "H.J. Lu" <hjl.tools@gmail.com> writes:
>>
>>> I am not saying we should go with 2 stage linking. Just for clarification.
>>> In 2 stage linking, the first stage only does symbol resolution. The complete
>>> linking starts at the second stage. ÂSo we don't do really complete relink
>>> in 2 stage linking.
>>
>> Understood. ÂBut you still read and process all the symbols twice. ÂIt
>> can be done if it must be done, but it would be significantly better to
>> do something else if possible.
>>
>
> Without 2 stage linking, which many compilers do for LTO, we will add hack
> on top of hack. As Richard pointed out, we need at least
>
> -lc -lgcc -lm -lpthreads -lgcov and maybe libssp, libgomp, ...
>
> -lm is currently added by user, not GCC driver
>
> Pass-through is just a hack, not a solution.
But I just suggested a different approach, which as far as I can see
solves the entire problem. Why not criticize that approach, rather than
continusing to discuss -pass-through, which we agree is a hack?
Ian