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Re: Update LTO plugin interface
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. ?So we don't do really complete relink
>> in 2 stage linking.
>
> Understood. ?But you still read and process all the symbols twice. ?It
> 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.
--
H.J.